General > General Technical Chat
I thought LED lights were efficient?
Northy:
Hi all,
I was about to pull the trigger on some new batton lights for the garage, then I saw the energy rating on them and was shocked! I know they won't be really on very often or for very long, but I'm quite keen on things being efficient especially after energy prices have just gone up a lot in the UK.
I was going to buy these, but they are out of stock:
https://www.toolstation.com/v-tac-led-batten-cw-tubes/p33970
Energy rating F (out of a possible A->G).
Am I missing something here?
As that one is out of stock, I started looking at others:
https://www.toolstation.com/integral-led-lightspan-ip20-ik08-batten/p16505
https://www.screwfix.com/p/lap-oxbo-single-4ft-led-batten-18w-2100lm-220-240v/465pp#BVQAWidgetID
https://www.amazon.co.uk/Ceiling-Surface-Mounted-Natural-Garage%EF%BC%8CWarehouse/dp/B0921N9L11/ref=sr_1_2?m=A2P55RBX0AFDJE&marketplaceID=A1F83G8C2ARO7P&qid=1648893162&s=merchant-items&sr=1-2
Are these things just a load of SMD LEDs behind a plastic cover? If so does it really make much difference which one you buy as long as it's not so badly made that it's not safe?
Does anyone have any recommendations for anything like these in the UK that they think are worth buying?
Thanks,
G
harerod:
<rant>
We got new 24" monitors the other day, with an efficiency rating of "D" for a consumption of 14kWh/1000h. 14W average? Remember when a 17" tube slurped >100W?
</rant>
The https://en.wikipedia.org/wiki/European_Union_energy_label was updated in 2021, with the goal of eliminating A++ ratings. The most parsimonious devices barely make it to "B".
Since the label is based on law, for once we get free access to the actual texts (no obolus to (Aus-)Beuth-Verlag (German joke) required). The calculation scheme is given for each device.
eti:
They're VERY efficient... for the manufacturers, since every time the supposed "40,000hrs!!" rated life falls WAY short, you bin them and buy more.
BrokenYugo:
I mean, that first one is under 100 lumens/watt, miles more efficient than an old T12 florescent tube, but kind of crappy for a modern 80CRI (I assume) LED light.
tom66:
The energy rating scale changed a while back, so what was pretty much A+++ became 'C' or something like that. It's just to promote improvements beyond the previous maximum.
One result was this odd disagreement between EU and post-Brexit UK ratings:-
... Though I believe this was harmonised recently (not to get too political, but everyone knew that this would be the end result of Bx-it).
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