fluorescent, LEDs
Fluorescent light bulbs use phosphors to convert ultraviolet light into visible light.
The recommended type of 60 watt bulbs for use with a candelabra are candelabra bulbs.
The phosphors in fluorescent bulbs absorb ultraviolet light, which is emitted by the bulb's mercury vapor when electricity is passed through it. The absorbed ultraviolet light is then re-emitted as visible light, creating the glow we see.
Incandescent bulbs use 75-100 watts. Fluorescent bulbs use around 10 watts. LED bulbs usually use 1 watt.
Some items that contain phosphors include fluorescent light bulbs, cathode ray tube (CRT) television screens, and computer monitors. These phosphors emit visible light when excited by ultraviolet radiation or electrons.
fluorescent, LEDs
A fluorescent bulb
Fluorescent bulbs, or LED-based bulbs.
LED light bulbs are the most energy-efficient for home use.
T5 fluorescent bulbs work by passing an electric current through a tube filled with mercury and noble gases. The current ignites the gas, producing ultraviolet light that then excites phosphors coating the inside of the tube. The excited phosphors emit visible light, providing illumination.
For example the socalled phosphors. see the link below
The color of the light produced by a bulb is determined by the type of filament or gas inside. For example, tungsten filaments produce a warm yellow light, while fluorescent bulbs use phosphors to convert UV light into visible light. LED bulbs use a semiconductor to emit light, and the color can be adjusted by using different materials.