Real numbers or fake numbers, lumens per watt on household bulbs at hardware store

brycenesbitt

Newly Enlightened
Joined
Oct 17, 2010
Messages
11
How much should I trust the "lumens per watt" rating on household LED bulbs and fixtures?

They seem to range from about 45 lumens per watt up to 100 lumens per watt, all the in same price category. Ceiling mount fixtures, where the LED's shine downward, seem to max out at about 85 lumens per watt. Are these real numbers or fake numbers?



Here's an 86 lumens per watt bulb from Ikea http://www.ikea.com/us/en/catalog/products/00334169/
Where a Feit A1600 is 100 lumens per watt, supposedly.

And we're down to 47 lm/w here for a LED ceiling lamp:
https://www.homedepot.com/p/Hampton...-with-Frosted-White-Shade-HB1023-35/205127898

What's fake news, what really represents efficiency?
 

ssanasisredna

Enlightened
Joined
Oct 19, 2016
Messages
457
For the most part they would be accurate to highly accurate especially if they are EnergyStar or LightingFacts indicated.
 
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