LEDs have no filament, therefore are extremely resistant to shock and vibration 81290/81291/81295-Overvoltage protection @ 34v-36v Includes stainless steel mounting hardware Available in durable black, white or chrome powder coated housings Mounts on one 5/16"-18 stud 81390/81391/81395-Overvoltage protection @ 17v-18v LED light is whiter and brighter than comparable incandescent lamps 5 year limited warranty More even lighting than comparable incandescent work lamps Focused spot light pattern 81290/81291/81295-Operates at full brightness between 21v and 34v LEDs have less current draw, resulting in increased battery and alternator life while allowing more power for other vehicle requirements Rugged all purpose work lamp Manufactured under Design Patent# US D572,856 S 81390/81391/81395-Operates at full brightness between 8.5v and 16v