There are different kinds and types of light bulb, though light is produce by power, current and resitance.1. The ideal light to use is a front light which it can lighten the dark room depends on the radius of the light or the reflector.
2. Incandescent light generally comes from a bulb like one found in a living room where there are different shapes and lights that have different watts which it differs on how much light it produces or the current and resistance of the light reflector.
3.Incandescent light has a type of a color cast of neutral contrast which also depends on the bulb shapes and kinds. Now we are using LED light to conserve power/energy.