Bulbs are not included. Socket GX 5,3, max. 50 W. Compatible with bulbs of the energy classes A++ - E. Originally with Multi-Mirror reflector with protective glass cover, halogen, 36° 50 W, 3000 K, 760 lm, 4500 h, CRI 100, EEC B (as at Sep. 2015). The halogen bulb is available separately. Also works with LED light source.