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**czado** · 06-13-2006, 12:51 AM

Here are known CF from Ivo Busko's article on AB:

Code:

Compact flourescent 
bulb    watts lumens lumens/watt 
Dulux54    55  4800  87.3 
PC6700     96  8100  84.4 
PLL950     55  3800  69.1 
PC6700     55  4230  76.9 
Ott CF*    23  1200  52.2

Average is 73.98 lumens/watt.
Since the Ott CF sample drops that and is ~30% from the mean, I consider the average 79.4 lumens/watt, for what its worth.

AFAIK there is no T5 sample (and only one T5HO) in Busko's article, but every manufacturer site I have read has 104 lumens/watt.

(Busko's article also states PAReff uE/s/Watt is the best form of light measurement for our purposes. I have not seen a rating for this for T5.)

06-13-2006, 12:51 AM	#3 (permalink)
czado Member of SCAPE Join Date: May 2005 Location: USA Posts: 353 iTrader Ratings: 4 iTrader Positive Rating: 100% Plant Points: 4885	Here are known CF from Ivo Busko's article on AB: Code: Compact flourescent bulb watts lumens lumens/watt Dulux54 55 4800 87.3 PC6700 96 8100 84.4 PLL950 55 3800 69.1 PC6700 55 4230 76.9 Ott CF* 23 1200 52.2 Average is 73.98 lumens/watt. Since the Ott CF sample drops that and is ~30% from the mean, I consider the average 79.4 lumens/watt, for what its worth. AFAIK there is no T5 sample (and only one T5HO) in Busko's article, but every manufacturer site I have read has 104 lumens/watt. (Busko's article also states PAReff uE/s/Watt is the best form of light measurement for our purposes. I have not seen a rating for this for T5.)