And don't believe the "equivalent to" on manufacturers' packaging and ads. Look at these figures for CFLs- They are producing just over half of the claimed lumens output after 10 minutes warming up when new, making the much vaunted 'savings' a sick joke. I expect the claimed output from leds will be found lacking too.
http://www.telegraph.co.uk/news/wor...saving-light-bulbs-offer-dim-future.html 
