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20W/50W/100W Waterproof IP65 LED Flood Light Halogen Equivalent 40% OFF @$12.59 @Amazon

$12.59
-2 Deal Score
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Amazon provides these 20W/50W/100W LED Flood Lights for 40% OFF.
#2 in Industrial & Scientific > Lamps > Incandescent Lamps
Fakespot Grade: A - You can trust the reviews of this product.

Was: $20.99/25.99/39.99
Now: $12.59/15.59/23.99 + FS for Prime

20W LED Flood Lights [amazon.com] 40% OFF Code: X5R7JD8E
50W LED Flood Lights [amazon.com] 40% OFF Code: PJE5KQIP
100W LED Flood Lights [amazon.com] 40% OFF Code: 7GE7YQNC

Link: https://www.amazon.com/dp/B015DK06Q4
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3 Comments

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Joined Jun 2005
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#2
100w has Luminous flux: 4000lm

i wonder how accurate that is

i bought rab lights with like 10k lumens and they were like $400+
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Joined Jan 2015
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#3
Bought 100W, Thanks. Good deal if those specs are true.
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Joined Sep 2009
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#4
Quote from ionizer
:
100w has Luminous flux: 4000lm

i wonder how accurate that is

i bought rab lights with like 10k lumens and they were like $400+

That actually seems to be a mistake (there are many). The 50w has a claimed output of 4,000 lumens. The 100w claims 8,000, with the 4,000 number also listed. In anything relatively well designed 8,000 would be completely reasonable. There are a couple possibilities. It may be entirely accurate and output 8,000 lumens. It may have low efficiency LEDs or ones that are over driven and output less. It may also overstate the actual consumption (not uncommon) and output less, not because the LEDs suck, but because it's not delivering the claimed power to them. In any case, if it puts out half it's claimed number most people would never notice. It's the difference between one or two quality HID headlights. Two is better, but one is still quite a lot.

As a general rule you can ballpark ~100 lumens per watt on any emitter that doesn't suck terribly. There are plenty above and below that mark, but it's a fair number for most common LEDs. I'd subtract 25% for optical loss, perhaps more if the design sucks. That would put this light at ~7,500 lumens out the front. I'd speculate less just based on the cost (parts bin stuff probably went in to it), but their numbers aren't wild claims.

If someone wants to send me one I can have it tested. I'm too cheap to blow money on lights I don't actually need. Peace
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