I went to HD today to look at the T5 light fixtures, on one of the boxes it said for height 15' to 40'. My question is would they work ok at 9'?
If you are looking at the fixtures discussed in
THIS THREAD then you might still consider them. If you have a white ceiling, it will act as a reflector and help spread the light. I have two of these fixtures over my workbenches, at about 7 ft, and while they are bright, the light is very welcome and not too much for my tired old eyes.
Here is a comparison pic of the 92 inch four lamps in tandem T5HO fixture on the right vs an old 8ft T12 non-HO fixture on the right.
One member here installed them and decided they were too bright because he entered the garage from the house at an elevated level, putting him near eye level with the fixtures.
THIS IS THE THREAD His cure was to install plastic covers over the lights. The covers are short, it takes four to fully cover the 92" fixture above, and they are made for use on the non-HO 28w T5, but they apparently work fine on these fixtures also. Scroll down to post #17 and below in that thread.
Pic mharris2007 posted it the other thread, of lights with the covers on them. I would like to hear about how they are holding up to the heat, as I have considered them to slightly dull the sharpness of the light at my workbenches, and more importantly provide some impact protection when I get to swinging around long things. I have bumped my old bulbs before, but luckily never broke one. Disadvantage to them is that they will collect dead bugs.