Has anyone used these Cree LED Work Lights to DIY?

I have already purchased some Vero29 COB lights and have also been considering DIY HLG quantum boards, but I came across these and was wondering why they are so cheap:

https://www.ebay.com/itm/8D-CREE-12INCH-544W-LED-Work-Light-Bar-Spot-Flood-Offroad-ATV-Truck-4X4-13-14/273224077510?ssPageName=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649

This company makes these lights with Cree and OSRAM pcb arrays that seem to get over 150lm/w at full power. I am wondering how much the efficiency would rise if they were dimmed with a 12v transformer. Seems like they would get 175lm/w or more for much cheaper cost, and they make dual spectrum versions 6500k/3000k. Surely the PAR output would be high as well because of the chips.

thats prob about 50-70W if i had to guess. im sure the housing is pretty indestructible if you need that. the intense focusing wont do you much good unless you want to hang it 3 feet above your plants

go buy some $5 15W (100W replacement bulbs) at walmart or home depot. will do you just as well

I already have Vero29 Cobs and some lm561c strips, but I tried one of those lights linked above and it is definitely a cheap solution with good efficiency. I wired one of those to an old laptop adapter and it put out .6 amps for 33 watts and gave 50000 lux at 12 inches. If anyone is interested in a cheap/easy cree light for seedlings/clones seems like an alternative/something different. The footprint is decent because the chips are spread out over 12 inches. It could be driven higher like 100w or more and give good lumen/watt with a small case fan mounted to it. I may mess around and build something if I have time.
Anyway it would be a decent alternative for someone, seems comparable to other options.
BTW I don't work for the ebay/chinese company, just trying to help someone out somewhere.

jake.snake83 said:

50000 lux at 12 inches

Click to expand...

How was this measured?

A bio-engineered monkey that sees in luminous flux, that for some reason placed a light meter on the ground and measured it that way.
I re-measured it and 33w at 12 inches was 35000 lux (not lumens) on a regular light meter.

I was just curious if it was a new diode from Cree or Osram, but regardless it looks to be some newer diodes with high efficiency

WTF? Was it 50,000 lux or 35,000 lux? Did you and your bio-engineered monkey use the same lux meter?

33 watts /.6 amps = 55volts. You powered a 12v light with a 55v laptop supply?

Ya it was 35k lux and it worked fine for testing to see if it was legit.
Also, now people can build a grow cab right inside of their cars/trucks and just drive around all day to keep the lights lit.