FLE10HT2/6H/D/CD, 10W, Daylight Color, Compact Fluorescent Spiral Bulb, Equivalent To 40W Incandescent, Lumens: 490, Maximum Length: 3.70. Medium Base, Ballast Designed With Instant On Features Which Means It Doesn't Require Any Warm Up Before The Bulb Is Lit, Energy Star Rated.