On Friday, 6 January 2017 22:25:11 UTC, Martin Brown wrote:
On 06/01/2017 13:52, Dave Plowman (News) wrote:
In article ,
Martin Brown wrote:
Decent long tube fluorescents max out efficacy at around 55 lumen/watt
the consumer LEDs are now pushing 120 lumen/watt and improving in
addition to their intrinsically better colour rendering. They still have
a way to go to reach low pressure sodium's record 220 lumen/watt.

Ok. I've yet to find any LED which betters decent fluorescent (not plain
white) for colour rendering, though.

You surely jest.

Photography under fluorescent lights is nigh on impossible because of
the strong green mercury line. Autowhite balance fiddles it on digital
cameras more or less but for classic film it was dire. The human eye is
incredibly tolerant of accepting odd shades of "white" light as white.

Is it the eye though I thought it was the brain that sorted that sort of thing out.
There's also dedecaded f;oscenst lights for photographery (well there were) and for plants and for aquaruims. I think they do LEDs for all the above now.