It's highly relevant.
Watts = electrical power in Lumens = visible light out.
Lumens / watt = measure of lighting efficiency.
Graham
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I agree. The exact figure ought to be added to the A-G Energy efficiency rating bar on the side of the carton.
Oh and bulb output should be measured at half life. That'll knock the CFLs a bit.
Graham
-- due to the hugely increased level of spam please make the obvious adjustment to my email address
They have nothing to do with how bright the light is.
Graham
-- due to the hugely increased level of spam please make the obvious adjustment to my email address
Graham
-- due to the hugely increased level of spam please make the obvious adjustment to my email address
I was thinking half-life actually.
Graham
-- due to the hugely increased level of spam please make the obvious adjustment to my email address
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