I must say that the 50W bulb replace these parts thoroughly! Compared with energy-saving bulbs, I would spontaneously say 11W or 12W. Even the small 3W-E14 variant I finally turned in my reading lamp by the bed is loose enough light to read a book good. You have to imagine times, 3W only! And this will also only 6W, twice as efficient as their equivalent Kannidaten with fluorescent tube in it.
The durability is 18.26 years, with use at a mean of 3 hours per day. This brings me to probably not out with me they do sometimes even 5 or 6 hours. And when they thought 9 years, then the investment has more than paid off! :)