Algeria Horan wrote:



As just one (admittedly egregious) example, the bulbs referenced above:

CLAIM: Replaces light output from a 40 Watt bulb (aka 400 lumens)
TESTS: The F.T.C. found the bulbs produced only 74 lumens of light

CLAIM: The LED bulbs in question would last 30,000 hours
TESTS: They lost 80 percent of their light output after only 1,000 hours

YIKES!

I built my own LED light replacement for 48" tubes in our kitchen. They
have been running about 2 years, now. If they have lost some output, it is
not real obvious to me.

I'm getting something like 2000 lumens from a 20-LED string, running on 21 W
measured from the mains supply.

I can't reply to commercially produced retrofits, some of them are
apparently quite awful.

Jon