All Bulbs are branded either phillips, osram, crompton or Bells Sylvania halogen mains voltage lamp. Mains-voltage 51mm diameter reflector lamp with aluminium reflector. Aluminium coated version (GU10 lamp base) directs most of its heat to the front. No light goes to the back of the reflector. Lamp can be connected directly to the mains supply, so no transformers are needed. High and stable light output throughout the life of the lamp. GU10 base ensures good retension in the luminaire and easy, 'twist and take out' insertion and replacement. Typically used for accent lighting in homes. Also accent and general lighting in shops, hotels, bars and restaurants. EXTRA Lamp life approx 3500 hours.