LLM-3 Optical Power Meter
LLL-2 He-Ne Laser
LLC-18 Brightness Adjustable Tungsten Lamp
LLC-9 Sodium-Tungsten Lamp
LLC-5 Dual-Mode Tungsten Lamp
LLC-3 Brightness Adjustable White Light Source
LLC-2 Deuterium Tungsten-Bromine Lamp
LLC-1 Tungsten Bromine Lamp
LLE-9 High Pressure Mercury Lamp
LLE-8 Hydrogen-Deuterium Lamp
LLE-3 Multi-Gas Discharge Lamp
LLE-2 Low Pressure Sodium Lamp
LLE-1 Low Pressure Mercury Lamp