Hook: Ceiling HookThe Destroyed Ceiling Light decoration fits into a purple ceiling hook.
How to Get a Destroyed Ceiling Light Decoration
Cartel Pack Decorations
The Destroyed Ceiling Light decoration can be dropped from Underworld Alliance Packs, which were released on the Cartel Market and bought with Cartel Coins. Cartel Packs, including the Underworld Alliance Pack, include a random selection of items from the Underworld Alliance collection of items. You aren't guaranteed to get a Destroyed Ceiling Light decoration from a Underworld Alliance Pack, but it is one of the few ways to get a Destroyed Ceiling Light deco apart from buying it on the GTN from another player.
If you're looking to get a Destroyed Ceiling Light, the easiest way to get it is to head to the Galactic Trade Network (GTN) in SWTOR and buy it with credits from another player. If it's very rare and not available on the Cartel Market, you could try buying from the GTN and hope you get it.