LED strip comes with a 15cm wire ending on each side of the strip roll. Therefore, no extra soldering is required if the roll should be cut into 2 different pieces (i.e. 3 meters + 2 meters). https://docs.google.com/spreadsheets/d/1-L0YvDVq_V17lLOeBc-H19np4wcSLqI6X5i6OAOGoaM/edit?usp=sharing

I also have a new variety of the WS2812B chip called the “ECO”, which is supposed to have less power consumption, possibly for using with a battery. In my tests the ECO version did have the lowest baseline power consumption needing only 56 milliwatts with no LEDs lit, but with the LEDS lit the difference was less apparent having a difference of only 40 milliwatts with all the LEDs on full brightness white. Unlike standard RGBW tape, each LED has its own chip (SK6812) which enables it to be controlled individually. 5V power injection will be required to avoid voltage drop and specialised external controllers and programming will be required.

A voltage drop is manifested as the same color inconsistency or brightness attenuation from the beginning to the end of the led tape light. Voltage drop is the term used to describe the difference in voltage at the beginning of a wire run and the end of that run. Voltage drop is a result of the actual wire, or in our case the copper traces on the LED strip contributing a significant amount of electrical resistance. If you output 5 volts and have 2.5 volts of drop after 30 feet that means we’ve had a 50% voltage drop and our strip is only going to be receiving 2.5 volts total, which isn’t enough to accurately drive these LEDs and produce the correct colors. If you instead start with 12 volts and have that same 2.5 volt drop, it only represents a 21% drop in voltage and the remaining 9 and a half volts will produce significantly more accurate colors than the 5 volt strip. When questions are asked about the power consumption of these chips the standard answer is that each segment of the LED chip requires 20 milliamps, and therefore 3 full RGB led chips outputting full white should have a current draw of 180 milliamps, but I’m almost positive these estimations were made using 5V pixels, and are wildly inaccurate for 12V strips. A better way to compare 12V and 5V strips is to use wattage since Watts = Amps x Volts.

Being 5V strips, both types struggled to reproduce accurate colors near the end of the strip due to voltage drop, with the ECO version performing slightly worse than the non-eco version. Here you can learn anything about led strip lights, find the part you are intrested in to learn more knowledge. There are knowledge parts of led strip lights, power supply, controller, accessories, and how to connect led strip lights, etc.You can also watch our thousands of demo video. In my tests the WS2812B consumed half as much power as the WS2811 when no LEDs were lit, but as expected, the power consumption for the LEDS was almost exactly the same at 60 milliwatts per channel, and the full strip consumed 13.6 watts, about 6 watts less than the WS2811.This strip comes as a single full meter with a 3-pin JST SM connector on each end. Every LEDs segment can be cut. Solder to the 0.1" copper pads and you're good to go.you can also connect strips together to make them longer. To power this strip, you need a 12V power supply. In my tests the SK6812 had a moderately high power consumption at idle of .83 watts, and used 14.4 watts when fully lit with a significant amount of yellowing around LED number 90, but that’s not really a valid test since to produce white light you would only turn on the white channel, not all the channels. And while the white channel draws more than any other single channel, lighting the whole strip with white results in only 10 watts of power draw, the lowest white power consumption of any of the strips that I tested with the added benefit of near perfect color accuracy without power injection. Unfortunately, like the SK9822 the WS2813 strips performed very poorly in terms of color accuracy exhibiting noticeable yellowing after about 45 pixels on full brightness. The power consumption of the strip was predictably less given the increased internal resistance requiring only 12.15 watts for the entire strip when lit at full brightness. I’d expect his number to go up significantly with more power injection points. IP67 Waterproof(Silicon sleeve waterproof, PCBis encapsulated with silicon tube, witha plasticfastener, better waterproof, For Outdoor);