wibass, from experience rebuilding two older vehicles: Working inside the cab of a pickup is like working inside a box. YOU WILL NOT have enough lighting. I started out in my 24 x 36 shop, with ten foot ceiling, using the 48"-2 tube fixtures, three rows, spaced one foot apart end-to-end. I bought some initially and others as I could afford them. Not enough! Those "shop lights" with the regular bulb you can hang here and there- not really good enough. I wound up buying Halogen work lights when I found them on sale for like $4, hanging them from the ceiling on conduit so I could rotate them as needed.They are hot but sure put light where I needed it. Sometimes I wondered if there was such a thing as "enough lighting". I'd say go with what you have or can get and do as you need to do as each situation arises.