Incandescent light: A type of artificial light that works by using
incandescence. This involves passing an electric current through a thin
filament, making it hot and causing it to become energised. This
releases thermal photons which produce light and heat.Incandescent light bulbs are know for their high energy usage and their
low light. They are slowly being replaced by Fluorescent light bulbs,
which are more energy efficient.
Fluroescent light: Electricity is used to charge mercury vapor in neon
or argon gas. This produces a plasma that makes short-wave ultra-violet
light. This light causes a substance phosphor to fluoresce, making the
light that we can see.These lights are very energy efficient, and are replacing incandescent
in many areas.
Halogen Light: A tungsten filament is locked inside a small area filled
with a halogen metal gas. This, when increased in temperature by
electricity, causes an equilibrium reaction to occur. These lamps give
off massive amounts of light and heat, making them dangerous to touch.