Doug,
Congrats on your new shop, I’m sure you will enjoy it. This thread has some excellent advice and comments and I will add mine. Around here a person’s sanity in the Winter is determined by the size of their shop.
I spent a good part of my life with my “shop” being a laundry room, walk-in closet, or utility shed so I can appreciate a nice shop.
My shop is in the same building as my business office and also has rooms for my wife’s art studio. It is nothing fancy but is warm in winter and cool in summer. The building is 54x24 and is divided into 3 rooms, with 3 rooms I can confine the dust to just my shop. My shop area is 20x24 with 10’ high ceilings. The walls are finished with sheetrock and painted white with all my cabinets and shelving painted white also. I have 8 4 foot long 2 tube fluorescent light fixtures in the ceiling. The lighting is good but not great, 4 more fixtures would have been better. As you get older you will need more light. Important note here: not all fluorescent fixtures are the same. Like everything there is cheap and there is good and not often do the two overlap. The first fixtures I bought did not work when the shop was cold and didn’t last long either. I bought better fixtures and both lighting and durability improved. I just installed light fixtures intended for paint booth use in my wife’s art studio and they are impressive with brilliant light. She wanted natural light for true color and these claim to be that. The fixture is a 4 foot 4 tube unit and I have one over my main work bench now.
Think about expected temperatures, dust levels, paint fumes, whatever and anticipate your need for lighting and ventilation.
Put in 4 times as many lights as you think you will need, 5 times as many outlets and insulate twice what you think is necessary. In the summer with outside temps of 95 my shop is in the low 70’s without AC. Some of that coolness is because the floor is concrete (and the fact that morning temps here are cool). I painted it with appropriate paint and it has lasted for years.
Dust is less a problem and cleanup easier with a painted floor I think. Good idea from John on separate circuits on the lights. Mine are 8 on or 8 off, my wife reminds me often about that oversight. I have a few windows but wish I would have put in several long narrow windows just under ceiling height to allow more natural light. Dano makes a good point about the less shadows the better.
Not a day goes by that I don’t enjoy and appreciate my shop. Have fun!