so why the 89 lm/W requirement on lamps, but no ban on inefficient fixtures?

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Electric-Light

Senior Member
EISA legislation will outlaw 4' lamps with efficacy below 89lm/W, which means RE70 (GE SP, Philips 7xx, Sylvania 7xx). The RE70 lamps are only a few lumens per watt below RE80 lamps that meet the requirements.

So lamp efficacy is one thing, but overall, fixture makes a big difference. There are some corridor type fixture with utilization factor exceeding 95% while some fancier looking ones with efficiency below 60%.

Any idea as to why they're not regulating optically inefficient fixtures?
 

barclayd

Senior Member
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Luminaire efficiency is somewhat 'self-regulating'. The energy codes specify maximum watts/sqft values that are difficult to achieve with low quality luminaires.
db
 

Electric-Light

Senior Member
Luminaire efficiency is somewhat 'self-regulating'. The energy codes specify maximum watts/sqft values that are difficult to achieve with low quality luminaires.
db

So, I don't really see how it makes sense to ban 32W 2800 RE70. 32W RE80 is 2950 so its not much of a difference. It's only a 5.3% gain.
 
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