Depends on the fitting it is in. A single bulb of multibulb fitting?
The light switch at the wall MUST be on, AND at least one other appliance in the house or another normal light be on somewhere.
Take the lamp out of the fitting and touch the two terminals with your fingers. It will light up if the battery is charged.
I think I'm missing something, maybe don't have the right wiring but I'd assume it should work regardless. It's not working at all, maybe a faulty bulb.

