USB LED slot would be great.
Tight enough to hold light bulbs, thoroughly time tested.
USB power adaptors are super cheap and durable and the existing designs may be used.
Tight enough to hold light bulbs, thoroughly time tested.
USB power adaptors are super cheap and durable and the existing designs may be used.
In either case, you'd need a very beefy DC power supply somewhere to get enough current, or individual power supplies scattered inside walls, etc. which sounds like a maintenance nightmare.