Quote:
Originally Posted by Michigan Mike
This is old outdated info. This is back when ATI recommended running the fans at 4.5v. Ryan's info is good. For optimal bulb life and par run the fans at 9v unless your room temp is in the 60's*f. Look up the thread by Kengym called "time to change my T5 bulbs and PAR readings" or something to that effect. Later in the thread he switches the fans to 9v (and others) and gets way better performance.
Too many people with Apogee meters to deny it nowadays.
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Thanks. I have found the
thread. As suggested in post #363, I am going to measure the exhaust's temperature and take it from there. I also have a PAR meter, but if get the right reading I am unlikely to bother using it. My expectation is that 9v will be the optimum fan speed despite rather luke warm ambient temperature because my unit has only two speed fans for six tubes.
