These lights produce several times the output of competitor PC lamps. The high impact poly-carbonate body filled with our unbelievably tough urethane, makes this light nearly hammer proof. Mounts by drilling a 3/4 inch hole and pressing into a grommet. White wire is ground and the black wire is power/hot. As always, we have used the best quality components and simplified design to provide our customers with top quality product at a fantastic price. DIMENSIONS: 0.71 DIA x 0.97" VOLTAGE: 9 - 14V DC CURRENT: 0.07A LEDS: 1 Next Generation, WIRE: 9" sheathed MOUNTING: Grommet mount into ¾" hole LED COLORS: Red LIGHT BEAM ANGLE: 180º Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.