They also sell the ballasts only, at all of the above stores also.Some t-8's as low as $15.Im going to buy a t-8 ballast for one of my shoplights i got from home depot.
The t-12 ballast quit after three months.I put t-8 bulbs in it and it worked for that long.I have another shoplight with t-12 ballast and im using 40w t-12 phillips daylight deluxe bulbs 6500k.Some blue tinge in light color. Good for plants though.IMO the t-8's are a better buy.Try to find the t-8 shoplight and bulbs,and or t-8 ballast.Whiter bulbs with the daylight deluxe bulbs look great over the tank,all 6500k bulbs.