"These CFL bulbs give out very high lumens for only a 9w bulb. At just over a quid each its a mega bargain. It starts up almost instantly and take about 20 secs to reach full brightness but I use them on outdoor wall lights so it didn't bother me. Only con about it is its rather large and just about manage to fit in my wall lamp."
"This is the second one I've purchased in as many weeks. Excellent value and easy to fit. I would have preferred a side cable entry instead of it being on the underside, but it didn't cause much of a problem."