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Download FAQ LED Strips

LED strip:

It has also been called Flexible LED strip, SMD LED strip, LED Ribbon.
It is made by FPC and LED, looks like strips or ribbons, especially flexible, maybe this is the reason it has been called led strip or led ribbon.
FPC: Flexible PCB (printed circuit board), including single/double-sided board, multilayer.
LED: Light-emitting diode
SMD: Surface Mounted Devices
SMT: Surface Mount Technology
DIP: Dual In-line Package


*Led package
*Amounts of LED
*Color temperature
*Beam angle
*IP rate--waterproof ability
LED packaging:
Color of LEDs:
LED colors are available in red, orange, amber, yellow, green, blue and white. Blue and white LEDs are much more expensive than the other colors.
The color of an LED is determined by the semiconductor material, not by the color of the ’package’ (the plastic body). LEDs of all colors are available in uncolored packages which may be diffused (milky) or clear (often described as ’water clear’). The colored packages are also available as diffused (the standard type) or transparent.
Calculating an LED resistor value:
LED resistor circuit An LED must have a resistor connected in series to limit the current through the LED, otherwise it will burn out almost instantly.
The resistor value, R is given by:
 R = (VS - VL) / I
VS = supply voltage
VL = LED voltage (usually 2V, but 4V for blue and white LEDs)
I = LED current (e.g. 10mA = 0.01A, or 20mA = 0.02A)
Make sure the LED current you choose is less than the maximum permitted and convert the current to amps (A) so the calculation will give the resistor value in ohms (ohm).
To convert mA to A divide the current in mA by 1000 because 1mA = 0.001A.
If the calculated value is not available choose the nearest standard resistor value which is greater, so that the current will be a little less than you chose. In fact you may wish to choose a greater resistor value to reduce the current (to increase battery life for example) but this will make the LED less bright.
For example
If the supply voltage VS = 9V, and you have a red LED (VL = 2V), requiring a current I = 20mA = 0.020A,
R = (9V - 2V) / 0.02A = 350ohm, so choose 390ohm (the nearest standard value which is greater).
Working out the LED resistor formula using Ohm’s law
Ohm’s law says that the resistance of the resistor, R = V/I, where:
 V = voltage across the resistor (= VS - VL in this case)
 I = the current through the resistor
So   R = (VS - VL) / I
Construction of Flexible LED strips:
the construction of the SMD led strips is as following:
take SMD3528, 60led/m for example:
first of all, every "3 LED and 1 resistor" is in series connection,  if we call it one group,
there is 20 groups on this LED strips,(60LED/3=20)
the connection of each group is in parallel circuit.
so, each 3 LED can be cutted, because, the connection between another 3 LEDS is parallel, cutting will cause not affects to another group,
and if one LED among the 3 LEDs breaks, all 3 LEDs can not light on, because the 3 LEDS are in series conections.
we call this model as: 3LED+1R.
the electricity currect of each LED is 0.02A, so, the electricity of each group(3LED+1R) is 0.02A,
there is total 20 groups(60LED/3=20), so, the electricity of each Meter( 60LED) is 0.02*20=0.4A,
the driven voltage is 12V,
so, the power comsuption of each meter( 60LED) is: 12*0.4=4.8W.
the construction of 5050 is the same:3LED+1R, but SMD5050 is 3 channel output,
take SMD5050, 60led/m for example:
the electricity of each 5050 will be:  60/3*0.02*3=1.2A,  the driving voltage is 12V,
so, the power comsuption of each meter of 5050( 60led/m ) is: 12*1.2=14.4W.

Brief introduction on IP grading


The IP Code consists of the letters IP followed by two digits and an optional letter. As defined in international standard IEC 60529, it classifies the degrees of protection provided against the intrusion of solid objects (including body parts like hands and fingers), dust, accidental contact, and water in electrical enclosures. This standard aims to provide users more detailed information than commercial terms such as waterproof.


The first digit indicates the level of protection that the enclosure provides against access to hazardous parts (e.g., electrical conductors, moving parts) and the ingress of solid foreign objects:


0X: No protection against contact and ingress of objects.

1X: Protected against objects bigger than 50mm, such as any large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part.

2X: Protected against objects bigger than 12.5mm, such as fingers or similar objects.

3X: Protected against objects bigger than 2.5mm, such as tools, thick wires, etc.

4X: Protected against objects bigger than 1mm, such as most wires, screws, etc.

5X: Dust protected. Ingress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the satisfactory operation of the equipment; complete protection against contact.

6X: Dust tight. No ingress of dust; complete protection against contact.


The second digit indicates the level of protection of the equipment inside the enclosure against harmful ingress of water:


X0: Not protected against harmful ingress of water.

X1: Protected against dripping water. Dripping water (vertically falling drops) shall have no harmful effect.

X2: Protected against dripping water when tilted up to 15º. Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15º from its normal position.

X3: Protected against spraying water. Water falling as a spray at any angle up to 60º from the vertical shall have no harmful effect.

X4: Protected against splashing water. Water splashing against the enclosure from any direction shall have no harmful effect.

X5: Protected against water jets. Water projected by a nozzle against enclosure from any direction shall have no harmful effects.

X6: Protected against powerful water jets. Water projected in powerful jets against the enclosure from any direction shall have no harmful effects.

X7: Protected during immersion up to 1 m. Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion).

X8: Protected during immersion beyond 1 m. The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer.


Once briefly presented the different IP ratings we move to the aim of this article, which is to describe the most common IP ratings applied to strip lights and to help choosing a LED strip light based on this rating.


Which IP protection fits your strip project best?


Flexible strip LED products are generally offered in two or three versions (depending on how wide is the assortment of the manufacturer):


IP20: Without waterproof treatment on top of PCBs, normally fitted with "3M" adhesive tapes on backside, fit for indoor dry areas use only. Many manufacturers that do not offer an intermediate version between IP20 and IP68 claim that these strips are fit for indoor use in general, which is not a real statement and can generate failure of the installation. Humidity or occasional contact with water can happen in indoor areas such as Kitchens or Bathrooms and therefore, and therefore these areas require additional protection.


IP64: With crystal resin glue protected on top of PCBs, normally fitted with "3M" adhesive tapes on backside, fit for indoor wet areas installation. This option is not always offered by all manufacturers, but those who offer it find that it is more successful than IP20 since the same width of strip allows a higher protection on top of a nicer dispersion of the light through the resin. The IP rating of these strips can be further enhanced with a proper insulation of ends and interconnections, which is why some suppliers claim these strips have a higher rating, such as IP66 or IP67. However, please note that the real IP of these products, by themselves, is IP64.


IP68: With silicon transparent tube protected and sealed at the ends. It can be either fully filled with glue or just inserted within a silicon tube, being the last option more practical in terms of interconnection and reducing the weight of the strips. It can either be sold with "3M" adhesive tapes on the backside or with silicon mounting brackets and DIY spare parts supplied. The adhesive tape option is not recommended since the weight of the IP68 strips is higher and can make the glue fixing fail in the mid term, which is even more probable in outdoor areas or of course, underwater. As a result, for a truly reliable outdoor installation, only mounting brackets should be considered. These strips are fit for outdoor and 1 meter underwater applications.


In conclusion, as a general recommendation, when buying a strip light always request to know the IP rating, since words such as "waterproof" or "fit for indoor use" can be deceptive.


High voltage LED strips:

This LED strip light is our new products, which is the 220V LED strip light- the High voltage LED Flexible light. The Input Voltage of this Flexible LED Lights is AC 220V, not the DC 12V or 24V, there is no need the transformer no need the DC power supply. You can connect this High voltage LED Ribbon Light directly on the AC 220V or AC110V.
The 3-chips SMD 5050 LEDs per meter high output LED strips is made to satisfy customers’ seeking a high brightness of the lighting and brilliant colors effects, the product characterized by the use of TOP 5050 SMD LED as a light source, there are bright, colorful, brightness uniform characteristics, for home decoration, hotels, an ideal light source cabinet lighting options.
The Features of voltage LED Ribbon Light:
Input Voltage AC 220V no need the transformer no need the DC power supply!
Red/Green/Blue/Yellow/Pure White/orange/pink/purple/Warm White available.
Used Super bright 5050 TOP SMD LEDs as lighting resources.
With accessories to help strip easy installation, strip continuous connection and strip connection to LED drivers.
This high output LED strip is IP67 waterproof.


110-220V High Voltage LED Strip Light

LED Source:                SMD5050/SMD3528
LED Qty:                     60 LEDs/M
Power:                        14.4W/M or 4.8W/M
Voltage:                       AC220V or 110V
Length:                        50M or 100M per roll
Cutting unit:                 100 mm
Color:                          White / Warm White / Red /Green / Blue/ Yellow / RGB
Viewing Angle:              120°
Packing:                       50m/7KG


220v High Voltage LED Strip Light Descriptions:

 Adopt SMD5050 LEDs of high brightness and high light efficiency as illuminant;
 Flexible and suitable for surfaces of all materials;
 5 meters for each strip, cuttable at the marking place, connectable simply by the terminals, 10 meters’ maximal length;
 Bright, colorful, seven optional colors.

220v High Voltage LED Strip Light Applications:

220v High Voltage LED Strip Light apply to decorative lighting for buildings, parks, entertainment centers, theaters, recessed lighting, cover lighting, cabinet and counter lighting, exhibition boths and display cases, etc.
Nine advantage of LED strip lights
First, pure color: LED flexible light strip uses high brightness SMD LED as light emitting devices, hence, have the advantages of LED light emitting devices, pure light color, soft, no glare. Either as decorative purposes, but also cater to lighting.
Second, the softness: LED flexible light strip with very soft FPC as the substrate, can be bent without any break, easy to shape, for a variety of advertising and styling.
Third, heat a small: LED flexible light strip of light emitting devices are LED, single LED as the power is very low, usually 0.04 ~ 0.08W, so heat is not high. Can be used as decorative lighting in the tank, without a lot of heat caused by rising water temperatures which affecting the growth of ornamental fish.
Fourth, the super energy-saving: LED flexible light strip 1210 of power per meter is only 4.8W, 5050 of the flexible LED strips per meter power of 7.2W, compared to conventional lighting and decorative lighting, the low power several times, but the effect was much better.
Fifth, the environmental protection: LED flexible light strip of material, whether LED or FPC, its materials are used in environmental materials, are recyclable type, not because of heavy use and cause environmental pollution and destruction.
Sixth, security: LED flexible light strip uses a low voltage 12V DC power supply voltage, so use is very safe. Whether the elderly, children can be safe and will not cause safety problems.
Seven, easy installation: LED flexible light strip installation is very simple, with a fixed clip, duct, wire, metal mesh, etc. can be installed in a variety of bearing surface. In addition, because LED bulbs light, thin, therefore, can also be achieved using double sided tape fixed functions. No professional can install, you can really enjoy the fun of DIY decoration.
Eight, Long life: LED flexible light strip of the normal service life is 8 to 10 million hours of work 24 hours a day, almost all of its life nearly 10 years. Therefore, LED flexible light strip has the life of the traditional lamp several times.
Nine, a wide range of applications: LED flexible light strip as soft, thin, pure color and other characteristics, are widely used in building the body contour, step, booth, bridge, hotel, KTV decorative lighting, advertising signs and the production of various large animation, advertising design, calligraphy and painting of the place. With LED Strip technology matures, its application will be more extensive..


Advantages and Disadvantages of LED:
 1) Size: LEDs can be very small (smaller than 2 mm2) and are easily populated onto printed circuit boards.
2) Cycling: LEDs are ideal for use in applications that are subject to frequent on-off cycling, unlike fluorescent lamps that burn out more quickly when cycled frequently, or HID lamps that require a long time before restarting.
3) Efficiency: LEDs produce more light per watt than incandescent bulbs. Their efficiency is not affected by shape and size, unlike Fluorescent light bulbs or tubes.
4) Focus: The solid package of the LED can be designed to focus its light. Incandescent and fluorescent sources often require an external reflector to collect light and direct it in a usable manner.
5) Slow failure: LEDs mostly fail by dimming over time, rather than the abrupt burn-out of incandescent bulbs.
6) Shock resistance: LEDs, being solid state components, are difficult to damage with external shock, unlike fluorescent and incandescent bulbs which are fragile.
7) Toxicity: LEDs do not contain mercury, unlike fluorescent lamps.
8) Color: LEDs can emit light of an intended color without the use of the color filters that traditional lighting methods require. This is more efficient and can lower initial costs.
9) Dimming: LEDs can very easily be dimmed either by pulse-width modulation or lowering the forward current.
10) Cool light: In contrast to most light sources, LEDs radiate very little heat in the form of IR that can cause damage to sensitive objects or fabrics. Wasted energy is dispersed as heat through the base of the LED.
11) Lifetime: LEDs can have a relatively long useful life. One report estimates 35,000 to 50,000 hours of useful
life, though time to complete failure may be longer. Fluorescent tubes typically are rated at about 10,000 to 15,000 hours, depending partly on the conditions of use, and incandescent light bulbs at 1,000–2,000 hours.
12) On/Off time: LEDs light up very quickly. A typical red indicator LED will achieve full brightness in microseconds. LEDs used in communications devices can have even faster response times.
 Some Fluorescent lamps can be more efficient.
1) Blue hazard: There is a concern that blue LEDs and cool-white LEDs are now capable of exceeding safe limits of the so-called blue-light hazard as defined in eye safety specifications such as ANSI/IESNA RP-27.1-05: Recommended Practice for Photobiological Safety for Lamp and Lamp Systems.
2) Light quality: Most cool-white LEDs have spectra that differ significantly from a black body radiator like the sun or an incandescent light. The spike at 460 nm and dip at 500 nm can cause the color of objects to be perceived differently under cool-white LED illumination than sunlight or incandescent sources, due to metamerism, red surfaces being rendered particularly badly by typical phosphor based cool-white LEDs. However, the color rendering properties of common fluorescent lamps are often inferior to what is now available in state-of-art white LEDs.
3) Temperature dependence: LED performance largely depends on the ambient temperature of the operating environment. Over-driving the LED in high ambient temperatures may result in overheating of the LED package, eventually leading to device failure. Adequate heat-sinking is required to maintain long life. This is especially important when considering automotive, medical, and military applications where the device must operate over a large range of temperatures, and is required to have a low failure rate.
4) Blue pollution: Because cool-white LEDs (i.e., LEDs with high color temperature) emit proportionally more blue light than conventional outdoor light sources such as high-pressure sodium lamps, the strong wavelength dependence of Rayleigh scattering means that cool-white LEDs can cause more light pollution than other light sources. The International Dark-Sky Association discourages the use of white light sources with correlated color temperature above 3,000 K.
5) Voltage sensitivity: LEDs must be supplied with the voltage above the threshold and a current below the rating. This can involve series resistors or current-regulated power supplies.
6) High initial price: LEDs are currently more expensive, price per lumen, on an initial capital cost basis, than most conventional lighting technologies. The additional expense partially stems from the relatively low lumen output and the drive circuitry and power supplies needed.
7) Area light source: LEDs do not approximate a "point source" of light, but rather a lambertian distribution. So LEDs are difficult to use in applications requiring a spherical light field. LEDs are not capable of providing divergence below a few degrees. This is contrasted with lasers, which can produce beams with divergences of 0.2 degrees or less

What is Color Temperature? 

Color Temperature is a term used to describe the color of a given light.

It is based on the color given off by a glowing hot piece of platinum.

For instance, heat the metal to "red hot" and its temperature describes the red color.

Heat it more and you get "yellow hot," "white hot," eventually even "blue hot." 

The Kelvin Temperature Scale 

Color temperature is always measured in degrees Kelvin.

The Kelvin scale is the temperature scale normally used in physical sciences like astronomy.

It is like the more familiar Fahrenheit or Celsius scales, except 0º on the Kelvin scale

is Absolute Zero - the temperature at which there is no heat energy left in an object. 

  Fahrenheit Celsius Kelvin
Absolute Zero -460° -273°
Water Freezes 32° 273°
Room Temperature 70° 21° 294°
Water Boils 212° 100° 373°
Surface of the Sun 9937° 5503° 5776°



IP65 LED strip light

LED lighting device is increasingly more popular simply by households along with businesses around the globe. Yet another thing, individuals might have vast application with these LEDs. These kinds of LED lighting lights aren’t just energy efficient and value efficient and also eco friendly and also environmentally friendly. They simply have to be exchanged as soon as as well as a pair of every couple of many years, nearly all LEDs can operate consistently more than a decade.

LED strip light are a wonderful substitute lighting merchandise that can make background lighting for that house, store as well as industrial programs. An extremely recommended IP65 LED strip light merchandise at wonderful costs for each multimeter is a good site for you.

Inside usage, these people discover lots of utilizes specifically in decoration. You will find the appropriate in lighting upwards 4 corners as they can suit nicely straight into corner, or perhaps decoratively upon mirrors. LED Strip Lights appear in a couple of main types, the ultra vivid lights and the decorative strip lights together with colour-changing RGB choices. If you feel like acquiring these types of matches will be hard, you can contain the Loveislight LED Light assisting you out and about.



LED IP Ratings- LED Flex strip waterproofing explained - Waterproof v nonwaterproof LED strip lights





What are LED IP Ratings?



LEDs come in waterproof and non-waterproof applications. To choose the right LED strip light, first assess the conditions that the LED lights will be subjected to. Will they be indoor? Outdoor? Rainy areas? Desert climate? etc.IP ratings measure the amount of protection flexible LED strip lights get from the elements.

IP ratings are here to specify the amount of protection the LED received from the elements. The IP stands for Ingress Protection. Each IP rating has 2 numbers. The first number refers to the protection against solid objects (dust, etc) and the second number refers to liquid protection. Look below for our chart on IP Ratings. Our 5050 LED strip light and 3528 LED strip lights come waterproof or non waterproof!

LED strip light IP ratings what is an IP rating


Example :With an IP65 , The LEDs can be used in an outside setting and are water-resistant, but they are not waterproof and are not OK to be submerged. An IP68 can be submerged in water.


Note: These flexible LED strips


are not to be used in or around chlorinated or salt water, waterproof LEDs are fully submersible in untreated water.






Waterproof LEDs also have higher protection against foot traffic. Example would be movie theater aisles, yard pathways, staircases, restaurant bars, club floors, yacht deck lighting. Our waterproof LED flexible strip lights are perfect for bathroom or kitchen applications. Undercabinets near showers, sinks, or other high splash areas. These LED strip lights


can be placed just about anywhere.


Each of Flexfire LEDs LED flexible strip lights are rated with an IP number. Still confused? Email us at sales@aptlight.com



LED Strip Light Voltage Drop, What is Voltage Drop?



LED Strip Light Voltage Drop: What is Voltage Drop and how to fix it.




One of the most important things to consider while installing a LED Strip lights is the effect of what is called “voltage drop”. Low voltage lighting require voltage at the light fixture to be at 12 volts in this case. The longer the length from the light is to the transformer, the lower the voltage will be.


LED strip lights that are installed a few feet away from the power source should not be effected by voltage drop, but very long LED strip light lengths with long runs of cable may be require more careful voltage testing at the strip.

Example: If you are running over 40 feet of Colorbright LED strip light, or are using a long length of wire from the power source to the strip, the LEDs on the end of the strip light may appear dimmer than the LEDs near the front of the strip light. You would need to cut the strip at about 24-28 feet and insert 12V DC again with a solderless connector. The below diagram is from Elemental LEDs, giving an example of how to make a large LED installation.

voltage drop for 12v led strip lights

Maximum current - amps - through a 12V circuit in combination with size (AWG) and length of wire


To figure out which gauge wire you should use, see the chart below.

In an electrical systems the conductors should not be sized with voltage drops exceeding 3%. For a 12V system the maximum voltage drop should be less than 12 (V) x 3% = 0.36 (V).

The table below can be used to determine the combination of maximum current through a 12V electrical wire, size (AWG) and length of cable.

voltage drop and wire gauge size calculation for 12v LED strip lights

Note! Failure to use an adequate size may result in fire. Always secure a wire with a fuse.



  • 1 ft (foot) = 0.3048 m






Wire Gauge Design Procedure

  1. Calculate the total length of the wire from the source to the device and back again

  2. Determine the amount of current in the wire

  3. Correct wire gauge is in the intersection of amps and feet

Note! The wire size is required for a 3% voltage drop in 12 Volt circuits. Oversize the wire if the voltage drop is critical.

VOLTAGE DROP AUTOMATIC CALCULATOR HERE --> http://www.supercircuits.com/resources/tools/voltageDrop



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