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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.
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Products: LED Lightbulbs

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  1.  
    • CommentAuthorJT101
    • CommentTimeDec 29th 2011
     
    Just received my new LED lightbulb in the post and am very pleased. Figured not many people have these yet, so check out the future of home lighting on my blog: http://www.thebreadcrumbtrail.org/archives/907

    Here's a summary:
    I’m happy with my new LED bulb, and only replaced my CFL since it actually blew a couple of weeks ago.
    Costs around £10 / bulb, but should save around £50 / year for a typical household if all bulbs replaced (assuming 10 bulbs), with a payback of 1-2 years and saves around 270Kg CO2. Bulbs last approx 10-20years. Over next few years the cost will come down to pence rather than £’s
    •  
      CommentAuthorSteamyTea
    • CommentTimeDec 29th 2011 edited
     
    1 MWh.y^-1 on lighting seems high to me MWh/W would be 1x10^6/100 = 10,000 hours or they are all on for more than a year in a year (8760 hours in a year, add an extra 24 for next year)

    What you growing in the loft and how does the high miles compare to the Moroccan stuff :wink:
    •  
      CommentAuthorJSHarris
    • CommentTimeDec 29th 2011 edited
     
  4.  
    Hi
    I have just ventured into LED lighting, replacing one blown PAR38 100W filament bulb in our kitchen with one of these.

    http://www.tlc-direct.co.uk/Products/LALED38W.html

    I was sceptical as they are just under £20.00 and similar units on other sites were £60.00 plus. I am very pleased so far. The light output is good and the quality of light is excellent.

    The kitchen has 6 PAR38 bulbs and a high ceiling (12 foot). as 3 bulbs had blown I replaced 2 with

    http://www.tlc-direct.co.uk/Products/MGPAR3820ES.html

    and the one LED. I will now replace the remaining 3 100W bulbs with the LED when they blow. The energy saving bulbs are good but they suffer from a delayed warm up and the quality of the light is not as good over worktops etc, so I have used them over the floor area.

    Dave
    •  
      CommentAuthorJSHarris
    • CommentTimeJan 4th 2012
     
    That seems like a heck of a high price to pay for a light bulb to me, given the prices in some of those threads I linked to above.

    I have a feeling that there is a great deal of profiteering going on in the name of being "green" when it comes to LED lights.
    • CommentAuthorjms452
    • CommentTimeJan 20th 2024
     
    Unable to start a new thread so appending this one :)

    While replacing an aging dim CFL I got to looking at bulbs.

    Proper 100W equivalent, 12W 1500 Lumens LED - Great.

    What threw me was that they were rated E for energy efficiency!

    Last time I purchased bulbs >100Lumens/W was great and you only got that on low power bulbs.

    Has the standard changed? Can you even get A rated >1000Lumen bulbs?

    This was what I was looking at for reference:
    https://www.amazon.co.uk/dp/B0CNXYGHRT?ref=ppx_yo2ov_dt_b_product_details&th=1

    Also when an old fashioned 40W for 630lumen bulb is only Energy efficiency G are we loosing the abiliuty to meaningfully differentiate between a good and a poor efficiency!
    https://www.amazon.co.uk/Bayonet-Halogen-Dimmable-Chandelier-AC220-240V/dp/B0CF252DVB/
  7.  
    In 2021 the EU changed the energy rating standard because too many things were getting A++++. Everything was revised downwards so that there would be space above for new products. This means that very energy efficient products produced today will get a B or C.
  8.  
    • CommentAuthorcjard
    • CommentTimeJan 20th 2024
     
    @jim to start a new thread you have to log in in the top leftnof the main forum thread list, rather than using the username and password boxes above the reply box in an existing thread
  10.  
    Posted By: WillInAberdeenhttps://theledspecialist.co.uk/osram-7-2w-e27-ultra-efficient-led-filament-gls-light-bulb.html" rel="nofollow" >https://theledspecialist.co.uk/osram-7-2w-e27-ultra-efficient-led-filament-gls-light-bulb.html

    I'm thinking about these 1500lm for 7.2W = 200lm/W



    Wow. That's really impressive - supposedly 50k (rather than typical 20k) hour life as well. When these 'filament' LED bulbs came out I got them impression that they compromised lifespan and efficiency for appearance but they now seem to be leading on both counts.
  11.  
    Posted By: Simon StillWow. That's really impressive - supposedly 50k (rather than typical 20k) hour life as well.

    Impressive yes but over here their price premium doesn't make up for the performance improvement
    • CommentAuthorjms452
    • CommentTimeJan 27th 2024
     
    200lm/W amazing for next time.

    thanks all

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