No overhead lights.... they are just too harsh with bad shadows.
Desk lamps and lava lamps for a more intimate feeling is critical. Proper floor lamps would also work well for ambient lighting.
You need enough light to see what you're doing comfortably without glare and shadows. And if you're writing, to be able to see the lyrics if they're not on a computer screen.
I'm with Rain, I prefer the room more dark than light when I'm working and creating.