On Tue, 05 Jun 2018 03:02:10 -0700, tabbypurr wrote:

On Monday, 4 June 2018 15:07:59 UTC+1, Brian Reay wrote:

Currently we have 3 5ft florescent lights in our Garage (a double, side
by side one). The light level is good. The garage is used for some diy
work and a corner doubles as a utility area, besides (of course) being
used for cars etc.

However, I'm tired of replacing the tubes- there 'always' seems to be
one which needs to be replacing etc. (A bit of an overstatement but
....)

So, I'm considering LED replacements.

Just swapping the tubes (removing the starters and 'choke' is part of
the process I believe) is an option, as is new fittings.

However, I'm concerned about achieving enough light.

The existing tubes are 58W which, seem to give 5500 or so lumens (based
on an internet search).

To get a comparable output in lumens, it looks like I need 60W leds
(going by a Screwfix ad).

Am I missing something? I was hoping for lower power.


(The lumen numbers for florescent tubes seem to vary, the 5500 number
is one I found.)

LEDs are being hyped, the reality is generally they're little or no more
efficient than fluorescents. They will be some day.

You can buy 125LPW LED GLS lamps in Asda and Home Bargains stores (8
quid a pair of 1522Lm bulbs in Asda or 3 quid for a single 1500Lm bulb in
Home Bargain). The problem with LED tubes is you have to shop at
specialist suppliers to get better than the 90LPW rating typical of T8
fluorescent tubes.

If you're looking for a more economic to run LED replacement, don't
waste your money on Aldi and Lidl's offerings. Up to now, checking out
the specifications of such tat has only made my lip curl in disgust at
the results of my LPW calculations. One day, maybe such calculations
won't be the lip curling exercise they've been over the past 3 or 4 years
I've been checking out such 'offers' in Aldididdle.

--
Johnny B Good