Putting around 15 8' t-8 strip lights in my shop and looking around at bulbs. I know I want 4', 5000k 32w bulbs, but after that it seems like the options are limitless. Are the cheaper brands ok to use? (as opposed to phillips, Sylvania, etc...) how much real world difference is there in lumens between say, 2600 and 3000? How about CRI? Looking for best value and advice.