HALOSTAR ENERGY SAVER is the smallest ever OSRAM energy-saving lamp.  The cutting edge technology makes environment protection easy, allowing you to save up to 60% in costs compared with lamps of a similar output. General Benefits of Eco-Halogens: Saves 60% in energy and electricity costs compared to standard incandescent bulbs Like for like in size Fully Dimmable Instant Start Up 4000 hours average rated life. Lasts longer  compared to standard incandescent bulbs Brilliant sparkling white light with a colour rendering index (CRI) of 100 No mercury or other hazardous materials