Bulbrite 150R40PG 150-Watt Incandescent Plant Grow R40 Reflector, Medium Base, Blue [4 Pack] Get the perfect light with the R40 E26 Medium Screw 150 watt 120 volt Incandescent light bulb. Box contains 1 bulb. Dimmable: Yes, Cool White Average hours: 2000, Beam Spread: 36, MOD: 5, MOL: 6.50