BTW... the lighting is DIY and I have 4 for redundancy in case of failures. I built them with two ballasts in one case with cooling fans so that each case runs 2 fixtures. that way throughout the day my timers will change over from one set of ballasts to the other and the theory is that with a shorter run time each day the amount of heat destruction on the components is minimized.... also allows me the option to run 4 different spectrum bulbs at different times of the day if I ever thought I needed to....lol