My last T12 bulbs finally burnt out so it is time to replace the light fixture over my workbench in the basement with a T8. I buy my bulbs in bulk and would like to only have to by one kind. I do most of my detailed work down there, such as gun smithing and other hobbies that involve small pieces. I currently have a 4' 2 bulb fixture and was wondering if installing a 4' 4 bulb light would be overkill. I feel like i never have enough light down there.