Had one, died after 1 year. They are the same as a 4"(120mm) fancy computer fans with a built in thermostat to change the speed of the fan. Not sure if they are the same temp range.
I use two chepo computer fans with a wall wort on the same timer as my MH lights, cheaper alternative solution.
I'm starting to think the same thing. Saw some cheap fans at that fish place but I think I'm going to by some cheapo fans on ebay for $5 a piece and set them on a timer.
Unrelated question: Do Electronic ballasts fire double ended bulbs as well as the magnetic ballasts?
i believe magnetic overdrives some, or all, bulbs.electric runs them at the rated wattage, and i think sometimes maybe a little lower, not by too much though. bulbs have a longer life with electronic ballasts when compared to magnetic.do a search on RC's lighting forum.