And which LED strips did you use in your comparison? You know, LED strips with comparable 100w of LED power that you didn't think existed.

i used ws2812b led strips. nobody told you i didn't know they existed LOL. i sais i don't want and can use them.

this is my last reaction, i have what i need and this conversation is useless.

 

i used ws2812b led strips. nobody told you i didn't know they existed LOL. i sais i don't want and can use them.

this is my last reaction, i have what i need and this conversation is useless.

Enjoy. Still surprised your first argument was - strips cant achieve 100W. Then when several people say they do exist, it turns out you've already tested them and the the argument suddenly veered to how they penetrate water. By the way, you need to present this non-Snell behavior of various LEDs to the American Physical Society. That's quite a discovery.

 

Actually, I just bought a 5m strip if WS2815 12V ones. The specs say 90W, but lighting them all with 255, 255, 255, they only drew 3.3 A at 12V.

So you might be right about the power.

Bob

 

Actually, I just bought a 5m strip if WS2815 12V ones. The specs say 90W, but lighting them all with 255, 255, 255, they only drew 3.3 A at 12V.

So you might be right about the power.

Bob

The 12VDC waste a lot of heat stepping down to LED voltages. Use the 5v LED strips.

 

The 12VDC waste a lot of heat stepping down to LED voltages. Use the 5v LED strips.

I believe they have 3 in series for each color (inside the chip), so not wasting more power, at full output. they run on about 11ma per chip vs 40 for the 5V strips as I just measured . And the light output is similar according the to datasheet and observed.

An odd thing, though. The entire strip (5 m) runs at 3.3A for full brightness white. But it runs the same current at full brightness red, green, or blue (found this on Reddit, and confirmed it with my own measurement) They are limiting the total current to control heat I believe. The 5V strips do not do this. The WS2812 datasheet says constant current 15ma without stating whether that is per chip or per color.

Bob

 

Ultra Bright 3 Watt Chainable NeoPixel LED [WS2811] : ID 4544 : $3.50 : Adafruit Industries, Unique & fun DIY electronics and kits

 

I think that the thread starter,rickv073 would appreciate this thread being closed.