Where I live many people are addicted to these gadgets. I saw one guy take one bite of his meal, then check his gadget, then another bite. . .
For me I guess the fun is in doing it myself from bits and pieces of what I already have. 
My test case will be two floodlights, both ~600 lumens & 120v, one from the market and the other from Grainger that is supposed to last 20,000 hours.
The long life bulb is noticeably dimmer.
I won't even need the white paper, just two photos of two couch cushions that these lights are over.
Then I guess I should check that the beam angle for both bulbs is the same.
Last edited by Wuzzat?; 01-10-2013 at 09:17 PM.
Source: http://www.houserepairtalk.com/f9/lighting-lux-digital-cameras-light-meters-incident-light-15344/
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