i just signed up here but my opinion after growing with LED's~they are the light to use in any cabinet or closet grow especially with heat concerns. The model i use is 4" x 40" with 52 3watt LED's. These units pay for themselves within a year with energy savings and bulb replacements! i just posted some of my grow pics in my introduction. here is pic of my lights in my grow! any interest contact me and i can hook you up!