The lamps are only type A lamps and type B lamps.

Type A lamps: fire emergency lamps whose main power supply and battery power supply rated operating voltage is not greater than DC36V. Others are B-type lamps.

Type A lamps are mentioned in Terminology 2.0.3. Type A lamps are fire emergency lamps whose main power supply and battery power supply rated operating voltage are not greater than DC36V. In fact, they refer to intelligent lighting and evacuation systems supporting intelligent evacuation systems. Indicator lamps. Type B lamps refer to fire emergency lamps with ordinary voltage (AC220V), which are our conventional ordinary fire emergency lamps.