On Wed, 17 Jan 2018 16:32:12 +0000, charles wrote:

In article ,
whisky-dave wrote:
On Tuesday, 16 January 2018 20:58:16 UTC, James Wilkinson Sword wrote:
On Tue, 16 Jan 2018 17:31:25 -0000, harry

wrote:

Came across this, interesting.
https://ledlam.co.uk/how-do-led-filament-work

Bet you their life is even shorter than a filament bulb.

One that I brought lasted under 3 hours. Not sure what happened. It was
a 4W=40W with 4 'elements'.


The room I'm is lit with 121 of these beasts. They've already out-lived
their filament predecessors.

Ye Gods! Just how big a room are you lighting if you're using 121 "40W
equivalent" 470 or 510 lumens lamps? By my reckoning that's something
like a total of 57,000 to 62,000 lumens' worth of lighting.

I'm forced to conclude that you're using the word "room" in the
theatrical sense to refer to a theatre or large hall as "the room".

--
Johnny B Good