Forum Discussion
Almot
Jan 30, 2014Explorer III
GordonThree wrote:
Watts per foot is a rather imprecise method to compare led strip lighting performance. A low quality strip might be made with junk leds which offer a poor lumen per watt efficacy; despite high wattage, not much light is produced.
The humble T10 wedge is 100 lumens, so a dual wedge dome puts out a blinding 200 lumens of light.
The roughly 3 foot strip I'm using puts out 1440 lumens, as much light as seven dual-wedge domes.
Gordon, I'll have to look into LED strips in your link. Its wattage is pretty high, @8W per foot, higher than most other strips. I think 1440 lumens strip is equivalent to ~3 domes, not 7.
For majority of LEDs you multiply the watts by 4 to get their equivalent in incandescent. Ex, 10W LED (strip, board, whatever) puts out roughly same lumens as a double-bulb incandescent dome with 40W total. Those LED strips that I've seen, have 2 or 3 watt per foot, i.e. to get lumens that a 40W dome puts out, you need 10W LED or 3-5 ft strip.
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