capturing radium paint of night sky at room ceiling. | Night Photos | Photo Forum

Hello sireesh_y. It sounds like you are trying to take a picture of a room’s ceiling with glow-in-the-dark stars on it — like in this picture. Is this right? If so, here are some general tips that might help.

1. If the glow-in-the-dark stars are not bright enough, try using a black light to give them a boost!
2. Use a tripod
3. Use a cable/wireless remote shutter release (or the timed shutter release)
4. Compose your scene with the lights on
5. Focus the lens manually with the lights on
6. Use manual mode on the camera. Set f-stop to wide open (low numbers) to start with. Set shutter speed to a few seconds. 
7. Turn off the room lights (keep black light on) and take the shot
8. Repeat

You may have to play with the f-stop and shutter speed combinations to get the desired amount of glow to appear in your shot. Try zooming in on just one star, then zoom out to get the whole scene. Experiment, have patience, and good luck!