Green Building Forum - low energy led Sat, 16 May 2026 05:02:16 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40152#Comment_40152 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40152#Comment_40152 Fri, 05 Dec 2008 23:11:36 +0000 Davipon low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40169#Comment_40169 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40169#Comment_40169 Sat, 06 Dec 2008 12:53:29 +0000 mark_s
# Exposure Time (1 / Shutter Speed) = 1/15 second = 0.06667 second
# Lens F-Number/F-Stop = 35/10 = F3.5
# ISO Speed Ratings = 200]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40183#Comment_40183 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40183#Comment_40183 Sat, 06 Dec 2008 16:09:59 +0000 CWatters low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40222#Comment_40222 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40222#Comment_40222 Sat, 06 Dec 2008 22:58:43 +0000 hotelRefurber I am asking these guys to come in next week and look at every part of my building.]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40229#Comment_40229 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40229#Comment_40229 Sun, 07 Dec 2008 08:35:53 +0000 jules low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40265#Comment_40265 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40265#Comment_40265 Sun, 07 Dec 2008 18:41:01 +0000 howdytom So just how many is a "fair few"
I'm still interested in the product. but would like some idea numbers required.
tom]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40273#Comment_40273 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=40273#Comment_40273 Sun, 07 Dec 2008 19:53:55 +0000 hotelRefurber low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41124#Comment_41124 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41124#Comment_41124 Wed, 17 Dec 2008 17:42:09 +0000 Pressure low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41313#Comment_41313 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41313#Comment_41313 Fri, 19 Dec 2008 19:13:49 +0000 djh
In regard to the 40 lumen rule, it's supposed to be a fitting that does NOT permit a lamp that does NOT meet the limit, so I'd argue that morally at least, GX53 is a no go.

T5 HE triphosphor tubes have at least double the output, are cheaper and more widely available, and there are beautiful fittings as mentioned by Nick or they can be concealed so I don't understand why there's any concern?]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41322#Comment_41322 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41322#Comment_41322 Fri, 19 Dec 2008 20:01:28 +0000 CWatters
http://www.litebulbs.co.uk/category/82/gx53-and-megaman-gx53.aspx

Quote: "Fittings which accept GX53 light bulbs are fully compliant with Part L of the building regulations"

Are there other types of lamp with GX53 bases that are > 40 Lumens/Watt?

Halogen down lights are popular due to the subjective quality of the light they produce. Yes tubes are more efficient but most consumer grade tubes and fittings don't match the quality of light you get from a halogen. I wanted to install some commercial downlights in my kitchen (as used in hotels etc) but couldn't find any that the BCO was happy with. He wanted them certified to Part E1 (sound transmission between rooms in a dwelling)! You can get halogen lamps and consumer grade CFL down lights that meet E1 but I wanted something a bit brighter than a consumer grade CFL. I was looking for something that took one 18W or two 7W PL tubes. Something like these..

http://www.tlc-direct.co.uk/Products/QMPL7C.html
http://www.tlc-direct.co.uk/Products/GLAT113E.html]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41343#Comment_41343 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41343#Comment_41343 Sat, 20 Dec 2008 01:36:31 +0000 hotelRefurber
For me any kind of flouro tube is a non-option, I dont like mercury and I refuse to support it - I intend to phase all mf cfl's out when I have a chance.

By the way I have been informed by responda light that they could achieve 2x the lumen output per watt right now by buying higher grade LED bulbs at over double the price - this would make each lamp around 50+vat - insurmountable for many?]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41577#Comment_41577 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41577#Comment_41577 Tue, 23 Dec 2008 17:31:52 +0000 djh Posted By: CWattersI know where you are coming from but seems others dissagree about GX53.. ... Quote: "Fittings which accept GX53 light bulbs are fully compliant with Part L of the building regulations" ... Are there other types of lamp with GX53 bases that are > 40 Lumens/Watt?

I agree there are GX53 lamps that are > 40 l/W but it does seem to me like the rules are being bent.

Halogen down lights are popular due to the subjective quality of the light they produce. Yes tubes are more efficient but most consumer grade tubes and fittings don't match the quality of light you get from a halogen.

I think it is mainly people's previous experience with pre-triphosphor lamps and a tendency not to fit multiple, bright enough lamps. Halogens are bright sources even if they only give small pools of light. People like the glitter. I think your idea of using brighter commercial downlighters is a good idea. Presumably you could meet acoustic regs with some sort of cover - perhaps one of the fireproof ones? Or if you have access from above, make a box out of plasterboard or somesuch.

Personally, we use tubes. My wife actually prefers them - she comes from the tropics - and I don't mind. It's very cheap to fit 'too many' tubes to make sure of the brightness and then just turn off any that are not needed.]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41585#Comment_41585 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=41585#Comment_41585 Tue, 23 Dec 2008 19:28:31 +0000 CWatters
He wasn't really happy with a beam and block floor because at the time we built it there wasn't a so called "robust design" standard. I eventually found a B&B floor manufacturer that had done a test. They sent me a copy of their certificate and the BCO was happy. I guess I should have just faked a sound test certificate for the lights :-)]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=51740#Comment_51740 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=51740#Comment_51740 Sat, 11 Apr 2009 21:03:41 +0100 Terry
HotelRefurber - any chance of the name of your Respondalight suppliers as we cant seem to find the prices you are quoting.]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=51791#Comment_51791 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=51791#Comment_51791 Mon, 13 Apr 2009 09:38:11 +0100 Paul_B
REading through this thread I have no info on Respondalight but I would recommend a look at the UltraLeds.co.uk website. I have bought a number of LED units from them (including LED strips under cabinet which work very well). They usually have the most up to date LED units and also give the colour outout, lum of the bulb and angle (something that is very important). For example they have just released the following unit:

100-240V AC High Power Nichia 5 x 1Watt Single Leds (5 Watt Total)
Flood Light 120'
Fully CE & Rohs Approved
Warm White 3000K (Looks just the same colour as your regular Halogen Bulb)
440 Lumen (50+ watt standard bulb equiv)
Glass Lens - Metal Case
Please note this bulb is 25mm longer than a standard GU10 Bulb but the same diameter 49mm

http://www.ultraleds.co.uk/u10ww5ngu10-240v-watt-nichia-warm-white-leds-wide-angle-p-2022.html

I recognise they are not cheap but as cutting edge technology, but you can also find other units that are cheaper with a corresponding output in light

HTH

Paul]]> low energy led https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=51795#Comment_51795 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=2910&Focus=51795#Comment_51795 Mon, 13 Apr 2009 11:11:25 +0100 CWatters