Heat is a primary concern when it comes to growing vegetables and plants. Inevitably when growing indoors, artificial light is used. No matter what light is uses, all produce heat.
Excessive heat leads to various issues. Plants suffer so we need to cool the grow space, we need to distance the lights from the plants. Now we need stronger lights because the light loses effectivity by being farther from the plant. We need bigger grow spaces that cost more rent.
Heat made us lose grow space, increase investment in more lights, increase investment in cooling systems (HVAC) and increase running costs. In addition, easy to forget, LEDs are efficient at low temperatures and now they are hot, they throw less light and their useable life can dramatically fall, so you had better budget for a replacement much sooner than implied by the datasheet of the manufacturer. Not good for your profit margins.