Quote Originally Posted by cba191 View Post
My ambient doesn't get below about 68 at most.
Yeah so then if you go with a 65 watt it isn't going to keep up.. Mine is a 88watt and those are my temps. 65 watts are for T8's mostly. Those have a 11" interior hight.. A 23" interior hight is totally different. I even have 1/2" Foam Insulation board under the enclosures so the stand doesn't draw out the heat and some over the tops. Its not a big deal Bob swops everyone if you need a bigger panel but once you drill holes and swop if you need to then you have to drill more holes because they don't lineup.