On 11/12/2016 1:42 PM, dadiOH wrote:
"Gramps' shop" wrote in message
...
Need to add some lighting. T8 or T12? Probably going with 2-tube 4
footers.

More - probably - than you'll ever need/want to know (downloads a PDF, takes
a while).
http://apps1.eere.energy.gov/buildin...offer_2013.pdf

To paraphrase it, if you want to save electricity, use LED; if you want max
light, use fluorescent (use electronic ballast)


Even ignoring the age of the report, I don't see how you reached that
conclusion. Quoting from the report:

"Dedicated LED troffers are ready to compete with fluorescent troffers
in terms of efficacy (lumens per watt [lm/W]), and in many lighting
quality issues such as glare, light distribution, visual appearance, and
color quality.
That is not to say that each one is stellar, but each one tested in this
CALiPER study bested the fluorescent benchmarks in terms of efficacy,
and almost all were rated highly in several categories—only one
luminaire of twelve performed consistently poorly."

and

"To summarize the experience of the observers, “LEDs have not improved
recessed troffers. But they have made them more efficient.”


To paraphrase it, if you want to save electricity, use LED; if you want
max light, use more LEDs.

My fluorescent are being replaced with (non-ballasted) LEDs in the house
and shop just as fast as I use up my stock of fluorescent bulbs. I wish
the stockpile was smaller, but the upside is that LEDs are still getting
less expensive. If I were buying new lights, I would not even look at
fluorescent.