Possible Clues:

• Desktop item, maybe
• ''Post'' or ''light'' leader
• ''Shade'' starter
• Small light source
• After a century one might get a light grip for this
• It takes a fifty ampere thing to get what's in in 11 across
• Spelunker's light
• Item on an end table
• Desk item
• 100-watt 2-volt bulb