In article ,
"Dave Plowman (News)" writes:
In article ,
therustyone wrote:
You could get one example of each lamp and measure the light on the
ground with a meter:

I'd recommend this too. Makers tend to lie through their teeth when giving
light levels from the latest whizz bang technology.

Make sure you run a lamp for 100 hours before measuring.
Some lamp technologies are slightly brighter when brand new.

All lamp technologies slowly get dimmer with age, so you will get a
misleading reading if you compare one newish lamp with one near end
of life.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]