Does anyone know if the TEK T5 light fixture (the 24") stays cool even with no fans? Does anyone have experience with this fixture? I've heard they're good fixtures. I just was wondering how it did without a cooling fan. Thanks!
T5s generally run cooler than MHs, mostly because they dissapate the heat over the entire length of the bulb. Generally t5 tanks do not require chillers. The fans within t5 fixtures are more to increase the bulbs effieciency than to keep you tank cool.
my water temp only raises about a degree or two and the fans like george said will help keep the fixture cool pulling as much heat away from the bulbs and ballast will help to extend the life of my equipment and give me the optimum output.
by the way tec lights came out with a new fixture that has the fans already installed but they are some big bucks.
I have owned several of the older ones and have one on my 30 gallon m-tank right now. They are just fine with heat.. Like was posted already fans are to increase efficiency and also help the bulbs last longer... A tek t-5 fixture is plenty of light for that tank.. In my 30 it is almost to much light for some of the stuff I am keeping.
I do have fans on my tank hooked up to a ranco controller though and they do blow across the bottom of the bulbs if the tank gets to warm but it is more for the tank than the lights. The place I lived in can get really hot in the summer and it is a precaution if I am not how to turn the air on.
The reason I opted for a fixture with no fans is they are quieter and this tank is small enough I did not have to worry about efficiency.