Alternative Technology Assn Forums

1. 

   dale182
   Member

   Hi guys,

   Have done a recent house addition and am popping my insulation in the ceiling at the moment. Unfortunately I didn't get the recessed LED downlights where the insulation can go over the top. The downlights I have are CA80 rated and cannot be covered with insulations but the insulation but may 'abut' the sides of the downlight. I just don't feel comfortable butting the insulation up against the downlight or is this not going to be a problem?
   Possible options include buying some cheap terracotta pots from Bunnings that have a small draining hole on the bottom (act as a vent) and putting them over each downlight or even a short length of pvc pipe. I plan to fix the driver to the top edge of the truss bottom chord.
   Anyone have some experience with this and provide some info or advice?

   Thanks in advance
   Dale

   Posted Sunday 16 Jul 2017 @ 7:07:04 am from IP #
2. 

   CharlieGreene
   Member

   These could be of interest - https://shop.ata.org.au/shop/led-downlight-insulating-cover

   

   Posted Monday 17 Jul 2017 @ 1:25:18 am from IP #
3. 

   Johnnojack
   Member

   This is a real issue and from what I've seen it is not being addressed. Issue 140 of Renew has a table pg. 84 showing the dramatic losses in insulation value when a very small percentage of the insulation is missing (ie no insulation over down lights). 2% missing from R.5 insulation results in 39% decrease in insulation value. ( resulting in R.3.06) Can any LED lights have insulation covering them completely? Looking at the design of them with their elaborate heat sinks I guess not. Surface mounted lights seem to be in the minority and some look to be of dubious quality. I want down lights but don't want my R.5 insulation to be down rated to R.3 If lights were to be covered by R.5 insulation they will surely have a shorter life. Any ideas?

   Posted Tuesday 18 Jul 2017 @ 12:45:07 pm from IP #
4. 

   arttt
   Member

   I used some of these
   http://www.sunnylighting.com.au/led%20downlights/led%20commercial%20downlight/premier/s9071/product-detail.aspx

   They are rated for covering by insulation. I think there is an r value limit.

   What you need to google is "IC rating: abutted & covered". Im not up on the details if you read up on it please report back with a summary.

   Posted Tuesday 18 Jul 2017 @ 9:58:28 pm from IP #
5. 

   Bushwalker
   Member

   As we update the rooms of our house, we have removed the halogen downlights, re-sealed the plaster and mounted LED fixtures to the ceiling.

   We chose larger diameter light fittings that have the transformer inside the fixture, so no requirement to enter the roofspace to replace the transformer or light fitting in the future. Better light in the rooms, and no concern about the insulation or air exit from the rooms through the fixtures.

   Posted Tuesday 18 Jul 2017 @ 11:48:30 pm from IP #
6. 

   Johnnojack
   Member

   Bush walker what size exactly are your new lights? Do you need less of them than the standard 100mm 13w lights. eBay link to similar?

   Posted Wednesday 19 Jul 2017 @ 10:49:03 am from IP #
7. 

   Bushwalker
   Member

   We bought a batch from Superlight two years ago. 11w 500mA current, 4200k, 120 degree beam angle. The LED panel is 13cm diameter and the total housing diameter is 18cm and 4cm deep. Throws a lot more light than our original halogen downlights. In one room we used to have 6 x 50w halogen downlights and two 50w wall lights, now we have two LED lights and one LED up light on the wall which is hardly ever used.

   http://www.superlight.com.au/surface-mounted-led-downlights-nz/item/102-led-clipper-ceiling-light-180mm-11w/

   Posted Wednesday 19 Jul 2017 @ 12:46:48 pm from IP #
8. 

   BlackIce
   Member

   Ive been looking at these for my MR16 LED retrofit

   http://efficiencymatrix.com.au/downlight-mitt-cover/

   Posted Thursday 27 Jul 2017 @ 9:51:16 am from IP #
9. 

   BlackIce
   Member

   Actually this is probably a better link;

   https://efficiencymatrix.store/collections/downlight-covers

   I also see that the link from Charlie Greene above is a similar or the same product and could be a little cheaper

   Posted Thursday 27 Jul 2017 @ 9:54:01 am from IP #

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