Yes 6500 K would be way to blue to detail under. I would go wtih a 4100K I have them in my garage and love them. I currently have 4 light fixtures each with 4-4'bulbs. I changed out two 8' fixtures that had 2 bulbs in them. What a huge difference between the amount of light plus the color factor. I'm still waiting to get 4 more of these fixtures. One piece of advise, look for a 32 watt T-8 bulb. Normally you will find 28 watt as they save a little on energy but the 32 watt will throw out a little more light. You could also try a 5000K bulb as well. I work in the maintenance dept. fora school district. We use both of these bulbs in our buildings. THe 5000k are in our gyms and we have 4100k but in 28 watt in our classrooms and halls. I don't think you will go wrong with either bulbs.
Hope this helps,
Brandon