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
OSRAM 4058075819412 LED (monochrome) EEC F (A - G) E-27 Pear shape 13 W = 100 W Warm white (Ø x L) 60 mm x 118 mm 3 pc(s)