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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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    • CommentAuthormarsaday
    • CommentTimeJan 1st 2018
     
    I need to think about the lights for my new workshop and office.

    My workshop is sized 6.2 x 3.5m and the office is 2.15 x 3.5m

    I was thinking about using ceiling mounted LED strip lights.

    I thought 2 lights in the WShop and one for the office.

    This 4ft light from screw fix seems ok.
    https://www.screwfix.com/p/lap-twin-led-batten-43w-4400lm-4ft/6481v

    Does anyone have any recommendations for this type of lighting ?
    • CommentAuthortony
    • CommentTimeJan 1st 2018
     
    Low temp warm white is best
    • CommentAuthormarsaday
    • CommentTimeJan 1st 2018
     
    Everyone seems to be selling the cool white which is a brighter white. I think i need this in the workshop, but the warm one in the office area.
    • CommentAuthorBeau
    • CommentTimeJan 2nd 2018 edited
     
    For the workshop I would use an Led flat panel light something like this https://trade.ledhut.co.uk/commercial-led-lighting/led-panel-lights/40w-led-panel-600x600mm-options-available.html. You get such a good spread of light from a panel. Yes you dont want warm white in a workshop IMO
    • CommentAuthormarsaday
    • CommentTimeJan 2nd 2018
     
    Looks interesting. Thanks for the link Beau.
  1.  
    Interesting - those panels look like they near enough match the output and price of T5 fluorescent tubes - that still wasn't the case a couple of years ago. https://www.tlc-direct.co.uk/Products/GLSW135HF.html

    Daylight white for a workshop and coolish for an office (very warm 2700k, warm 3000k, - i'd go for 3500 or 4000 for an office)
    • CommentAuthorBeau
    • CommentTimeJan 2nd 2018
     
    I should add the panel in my link was just an example not a personal recommend. Cant remember where I got mine from but Leds seem to be changing at such a rate that what was good a year ago could now be old hat.
  2.  
    It can be better value to buy a fitting that takes standard size lamps, then buy the LED lamp separately, seemed cheaper than buying an integrated LED fitting when we were looking recently.

    It does constrain the lamp shape to something that is not ideal for LED, but if the tiny power supply burns out early then you're not left replacing the whole fitting with a mismatched replacement. If the light turns out to be the wrong colour or brightness you can always swap the lamp later, or as the tech improves.

    Edit: that link to the flat panel does look neat though!

    Also think if you want a very directional light or a more diffuse ambient light.
    • CommentAuthorSimon Still
    • CommentTimeJan 2nd 2018 edited
     
    Posted By: WillInAberdeenIt can be better value to buy a fitting that takes standard size lamps, then buy the LED lamp separately, seemed cheaper than buying an integrated LED fitting when we were looking recently.

    It does constrain the lamp shape to something that is not ideal for LED


    Which has a very negative impact on reliability. None of my (admittedly quite expensive) constant current LED fittings have had any issues in two years but a worrying percentage of (expensive, branded) Gu10 bulbs have popped well in advance of their supposed 20k hour life..

    We've got high frequency fluorescents in the workshop/utility and store. As efficient as the best LEDs. Tubes are supposed to have a similar life to LED and they're cheap - £3. They are fragile (but that's not a problem onces installed) and we've had one (of about 9) seemingly fail (light level seemed to have dropped)
    • CommentAuthorsnyggapa
    • CommentTimeJan 2nd 2018
     
    we went pretty much all mr16 LEDs in our new build in 2011 (plus some LED flexible tapes in the kitchen under the units and a bedroom over the beams)

    The only LED units that have "failed" are the expensive Philips ones that had a fan in to aid cooling. The fan started to make a racket... The cheap as chips MR16 lamps just keep on running - 7 years with zero failures
    • CommentAuthorTimSmall
    • CommentTimeJan 2nd 2018 edited
     
    The best colour temperature to use depends when you're going to be using the place.

    Lots of cold blue light after about 6pm has a detrimental effect on sleep. During the day you might prefer it to keep you alert. Having two sets of lights with different temperatures available is an option (for extra points you could even make them automatically vary the colour temperature based on the time of day).

    Personally I find low colour rendering index LEDs give an unpleasant light (and I try and buy LEDs with a CRI of 90 or better if at all possible).
    •  
      CommentAuthordjh
    • CommentTimeJan 2nd 2018
     
    I would always have more than one light in any space. Firstly so you can still use the space when one light dies. Secondly because you get horrible shadows from a single light - especially troublesome in a work area or an office.

    We have a mixture of T5 fluorescents and GU10 LEDs (plus a few GLS LEDs and oddball CFLs, LED floods etc).

    In unconditioned spaces like the garage I used T5s in IP65 enclosures. 4 x 35 W in the double garage gives good general light, but I think I'd want a bit more if I was doing detail work in there.

    The kitchen has 6 x 21 W T5 but we only use 5 of them since that gives plenty of light. We've been in the house about two and a half years and the kitchen tubes seem to be reaching the end of their lives now.

    None of the GU10s has failed yet - they're Crompton for good CRI and an even beam with minimal colour striations. They're in open fittings to give them the best chance of keeping cool.

    We prefer whiter light to yellow light in general. The LEDs and the 35 W tubes are daylight (6500 K) and seem to be a good match to actual daylight. It can be difficult to tell when they're switched on in the daytime in some circumstances. The kitchen lights are 4000 K and that seems reasonable enough, a slightly warmer colour. The secret with white lights is to have enough brightness - they look terrible when lighting levels are low. We have a few 2700 K lamps in table lights etc for use when we want low levels, and to avoid blue late at night.

    Posted By: Simon Stillthose panels look like they near enough match the output and price of T5 fluorescent tubes

    Did you mean the price of the tubes themselves, or the fittings? Call me old-fashioned but I still prefer fittings where I can change the lamps when they die.
  3.  
    Has anyone tried the WiFi controlled lamps where you voice control them to change the colour temperature, or program them to be daylight in the day then warm white in the evening, or dim them whenever your phone leaves the room, etc etc? Phillips Hue white Ambience and similar.

    Price is falling fast £20-30ish but will still be a year or two before they are cheap enough to swap them into my fittings I think.

    Edit: like this one, adjusts from 2200 to 5000K. https://www.amazon.co.uk/gp/aw/d/B075FS9LR2
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