Good call. Who's got the initiative? I'm growing under an industrial right now, but I only have one fixture, so I can't compare. They're growing short and fat though...Industrial lighting in theory would be designed for a wider spread of light and at a much higher distance to do so. So really industrial lights should be alot hotter. Horticultural bulbs would be designed for minimal heat without lumen reduction. This is only in theory because im not actually sure how manufactures go about deciding on Lumens and kelvins and all the technical specs of the lamp. But thats what you would assume right? Someone should do a side by side test, its the only way to know for sure.