Join Date: Mar 2008
Location: Rochelle Park NJ 07662
depending on size of the housing, number of CREE LEDS (CREE are the best out there IMO, for the price), and Kelvin rating. seems the 6500k are more $ then the 10k (or equivalent) but not much. the power consumption is MUCH lower then a Power Compact or Metal Halide, less heat and lower electric bills!! i love my EVO72s...never have to replace bulbs, less power, more light...WIN WIN WIN!!!
what size 40 do you have?? ive seen people call 29s a 30g and the dimensions of a 30 are waaaaaaaaaaay different then a 29....so depth matters too....
it was the best bang for the buck vs buying a Marineland for 350-up....for my 72"