Star magnitude mini lights
Quick and easy method is incandescent bulbs with individual dimmers. Slightly different, led bulbs with led compatible dimmers. Or smart led bulbs which you can set to a percentage of light via your phone.

Harder would be a custom dimmer controller with triacs or ssr and compatible bulbs. Or go DC with a constant current led driver and the appropriate led modules. This can provide twinkling effects if you program it to. 

But smart led bulbs is probably the easiest.