BTW, if you have two center braces for your 6ft tank then don't go with two reflectors you'll have a terrible shadow in your tank. I tried it then had to buy another L3 since it was so annoying to look at. If you do go the route of L3s get minis instead if your depth is not too much, it'll give you more room for supplementation.
This is my tank with the large L3s and some T5s.