G4 10 LED Back Pin Light. G4 utilizes High Power LEDs for more than enough light to read and work by. As with all our replacement bulbs the G4 includes a built in Buck Regulator making it the most robust on the market today and produces little heat.. High Power - Low Heat. Larger size brings larger light. No Fire Hazard like that of Halogens. Super Bright. Up to 50,000 Hours. 10V-30VDC / 12 VAC