The WEST MARINE G4 Side Pin Downlight LED Diskhas been designed as a replacement and upgrade for standard halogen, Xenon and incandescent filament bulbs, offering dramatically lower power consumption and heat generation, while having much greater lifetime and shock resistance. For even greater light output and quality as well as higher efficiency (more light per watt) please look to our Premium series bulbs. This bulb replaces Red G4 bulbs, and other Red LED disk modules with side pins. 10-16VDC input range - constant power. 85 max lumens. Similar brightness to a 4 or 5 watt red halogen G4 JC5. Dimmable from 7.5-10V. 1 1/8" diameter Extremely long life Smart driver included This light is not +/- polarity sensitive