Browse Forums Lighting + Lighting Design Re: Downlight disadvantages - Insulation 2Apr 30, 2012 7:58 am House - Lockup completed 23rd December 2011 - Painters are in!!! https://forum.homeone.com.au/viewtopic.php?f=31&t=37261&start=0&hilit=Blaxland Re: Re: Downlight disadvantages - Insulation 8May 01, 2012 10:43 pm House - Lockup completed 23rd December 2011 - Painters are in!!! https://forum.homeone.com.au/viewtopic.php?f=31&t=37261&start=0&hilit=Blaxland Re: Downlight disadvantages - Insulation 10May 06, 2012 7:21 pm mattismase The LED downlight will pay for itself in energy savings 20 times over its life. The more you use it the quicker the return on investment.<cut> 200mm clearance around the lights is still small as a % of the total roof space area thus losses are relative. Hope this helps We'll have to agree to disagree here I think I think the payoff time for LED lights is exaggerated, the calculations should be based on 6hours a day in certain rooms and much less in other rooms. Therefore the LED would take longer to payoff then expected. However, I strongly agree that LED is better than halogen, I just think they are overpriced. Also very few manufacturers have proven the claimed runtimes, and people haven't had most LED's long enough to know. Personally I'm looking at CFL's or similar. As per http://www.consumer.org.nz/reports/rece ... t-our-test, even a small gap in insulation makes a large difference, and the downlights are always ventilated to some point. As you can see from the test, the CFL downlight mentions "CA" in the test, which is described as 5% or less of the light in used for ventilation and the insulation can be abutted to the light fitting. Even in that case its close to 171% so 71% extra heating to keep the room at 20 degrees. The builders standard is halogen downlights and the report says 199% or nearly double the heating cost. Their test doesn't exactly match Australian conditions as its generally warmer than 9degrees outside, but we also leave much larger insulation gaps. Either way, it was enough for me to change the plan and I'm getting batten's fitted and probably a ceiling mounted CFL Hey guys building a new place through a volume builder and just wondering if i should complain to the site supervisor as we just had plasterboard installed. Looks like… 0 11277 1000000% definitely add insulation. I have in my home and it makes a big difference minimising sound transfer. Insulation is pretty cheap and definitely worth it 2 6207 |