Unlike annoying fluorescent energy saving bulbs (CFLs) which produce an uninspiring yellow light, take time to reach maximum output and contain potentially toxic mercury, or expensive, inefficient incandescent bulbs, these new Halogen Energy Savers are both energy-saving and a pleasure to use. They’re as bright as standard 60W incandescent light bulbs but produce less heat and use 30% less energy; are ‘Long Life’ (lasting 2000 hours or twice as long as incandescents) plus reach maximum light output instantly and work with dimmer switches! On offer in several styles - they also give a bright white (not yellow) light. Ideal for wall and bedside lights plus we're offering standard sized screw and bayonet fittings (ideal for chandeliers) and at this price you can now afford to replace all the old, inefficient incandescents or annoying energy-saving fluorescents throughout your home.GLS ‘Globe’ style bulbs are also available with standard size bayonet or screw fittings and you can choose between the 42W (equivalent light output of traditional 60W incandescent) or super bright 70W versions (equivalent to a 100W incandescent bulb).