i have been buying low energy bulbs since they cost nearing £20 and looked like a large tube with a domed end
my only concession to style is the bulbs that look like oversized "normal " bulbs lol
any way over the years the bulbs last longer i have several off 15 to 20 years old the new ones light up to 80% almost instantly and 100% in less than 60 seconds
i dont go for "small "bulbs as the reduced size will mean greater heat and bulb failure
in general i say go for 4x the bulb rating or divide by 4 so a 13w bulb = 52 watts or a 60w normal bulb = 15w then you wont be dissapointed
Are the mentally deranged allowed to post? Smaller bulbs produce heat? 20 year old energy efficient bulbs? I'm confused. I buy energy efficient bulbs with a claim that they last longer than traditional bulbs, and fail at install.