TM 5-3610-295-13&P-12-7.PIN-POINT LIGHT SOURCE ASSEMBLY CONTROLS AND INDICATORS.Figure 2-5. Pin Point Light Source Assemblya.On-OffSwitch(1)- Turns light source and timer on and off.b.60SecondTimeControl(2)- Regulates the time the light is on.c.IlluminationControl(3)- Determines the strength of the light source illumination.2-5