I picked up both the CF1000 and the CF1500. I compared the CF1500 side by side with a ViparSpectra XS1500 and found the ViparSpectra to be superior here is the break down.
Cost:
CF1500 Amazon 175.00
XS1500 Amazon 135.00
Power use:
CF1500 Watts 170 (20wattts higher but lower light output and higher heat output)
XS1500 Watts 150
Light:
Light measured from the XS1500 is between 6% and 12% brighter than the CF1500 at all heights and at all points in a 2.5' x 5' tent (neither light was big enough on its own to support the tent on its own)
Heat:
At the lamp:
CF1500: near the fans 98 to 101deg but on the other side of the board its 130deg F as well as the driver
XS1500 With tent fan blowing across the fins is a cool 89deg at all points on the top and 96deg on the light surface itself so those heat sinks are working far far better than the three small fans in the CF1500 in part because the light reflector is shielding the board from the tent fans and forcing all the heat to be reflected down towards the plants caused some leaf burn for me even at lower light outputs.
At the dirt level:
The CF1500 heated the surface of the dirt 3deg higher than the XS1500 did. (which is a problem for me trying not to overheat my plants, but maybe something you need if you're trying to avoid space heaters)
Noise:
Neither light made any noise that could be heard over the tent fans.
Final take away.
The colofrog's light reflector is really a heat reflector and heat insulator preventing the light from cooling as the three small fans that are built in are totally inadequate. It would be better served to have all that removed and tent fans able to blow on the board to dissipate the heat.
The colofrog uses more electricity to produce less light with much seemingly being generated in heat by a diver that stats its only 88% efficient vs the name brand Mean Well driver on the XS1500 which claims 94% efficiency.
The colofrog may or may not be using samsung lm301h chips... This claim is made on amazon but not on the company website or in the literature that comes with the lights which only state they are LMS 3030 type. I t seems the company may be misleading people into believing that while the 3030 type is the same type of LED as samsung's lm301b and lm301h the chips in the CF1500 may not really be samsung chips and may not live up to Samsung's requirements.
And lastly the XS1500 is safe to use in damp / wet environments where the colofrog states it’s not for use in wet areas and cannot get wet at all.
I'd save the money and buy the cheaper better light... the XS1500 by ViparSpectr