T12 light output
>> The bottom line is
>> people prefer:
>> T8 bulbs in combination with an
>> Electronic rapid start ballast.
>Unless Dougs first measurements were made _after_ the initial 100
>hour "burn-in" period, he was getting an artificially high reading
>for that first measurement. The initial lumen ratings for these
>bulbs are _after_ burn-in.
Ian is quite right reguarding the intial burn in time. I did not
consider this fact. The intial lumens were 2200, last night I measure in the
same manner the lumen were 1800 (new lights a couple of weeks old) compared
to 1700 after 6 months at 12 hrs/day. It looks as if there isn't quite the
drop in intensity that I fiqured on.
BTW the local electrical wholesaler quote me prices of $16.35 per T8
bulb in case quanities of 30 bulbs and the electronic ballast at $32.95
I will stick to my T12 bulbs at 1.89 each.
Garson, Ontario, Canada.