Originally Posted by Gregcoyote
When keeping a house in the summer time at 78F that gave me a daytime tank temperature of 83 or better.
well, there's the factor that was missing. i think we can agree that if your house was kept closer to 70 in the summer, you wouldn't have needed the chiller. personally, i would have ran the A/C and had a cooler tank, and been more comfortable too.
as for the cost, it's "pay me now or pay me later".
just FYI, i am in no way an advocate for metal halides, and i do not condemn the use of LEDs. as a matter of fact, i find them to be the best way to light a tank, if you choose a quality fixture, and can afford the upfront cost.
i ran my 400 gallon system with a 400 watt halide, and three 250 watt halides, and my temp on the hottest day was 81. my tanks were in the basement, and we do run the a/c all summer.