This is a very energy-efficient bulb, perfect if you're trying to keep energy costs down. This type (E27) is one of the most common and fits most light fixtures.
Conrad Electronic
Megaman LG2605.5 E27 2800K LED (monochrome) EEC F (A - G) E-27 Teardrop shape 5.5 W = 40 W Warm white (Ø x L) 45 mm x 77 mm 1 pc(s)