CDC Mining Improved LED Mine Lamp Designs NIOSH
It uses the battery, battery cable, and headpiece of an existing MSHAapproved cap lamp that is commercially available. This existing cap lamp was retrofitted with new optics, three LEDs, an LED mounting plate, a printed circuit board (PCB) that provides programmable functional control of the mine lamp, and a single integrated circuit (IC) driver with three constant current sources for the LEDs.