DJ lighting is generally used by mobile disco DJs and in most modern nightclubs and many late-night bars.
With the technology of halogen lamps improving, the 80s and early 90s saw a new breed of DJ light starting to evolve.
In some DJ lighting effects a coloured mirror is used to avoid using color/filter gel.
Most modern projector DJ lights now use LEDs instead of halogen lamps.
They use a laser diode and an array of mirrors to project multiple colours and beams of light.