The product itself on OCUK says 4.5W
The Manufacturer claims 5w
The energy ratings claims 6.5w (picture below)
Now, 80% savings i believe is a generic term as nobody is really bothered to do the calculations. If a 5w bulb is saving 80% then it was originally 25w.
Im workin on some calculations regarding lumens and stuff, its actually very complicated..
OK so 425 or 360 lumen's, couldn't figure out what (D) and (W) means
The highest figure there indicates that it is 65 lm/w,
Standard bulbs give you 17 lm/w.. 17 X 25 = 425 lumen's (so a 25w bulb produces equal lumens)
Now leaves last question.. If lumens are equivalent across LED vs CFL vs incandescent etc..
Anybody here an expert on whether the claims by the LED bulb manufacturers are right? That the lumens from led need to be multiplied by 2.2 to get the "perceived" brightness that our eyes see?
So thats what i've been trying to figure out, all because of your post..
Either way lets multiply it by 2.2 that would mean that it would be the equivalent of a 50w incandescent bulb. For it to make sense it needs to be 4X, and i am not convinced this is even important, as a 5 minute google has not brought up anything about multipliers into it.