Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




3019 posts

Uber Geek


# 258622 13-Oct-2019 14:10
Send private message

So we have a house built around 2000 that has regular downlights (100mm hole with normal light bulbs).

 

The ceiling on the top story of the house has insulfluff. 

 

I would like to update the lights to 230v LED downlights

 

As far as I can see its legal to replace a light fitting in your own home - So physically replacing them seems to be legal.

 

Any new LED downlights would not have insulation over the top of them - (as the current downlights are obviously not covered) so presumably should be ok heatwise.

 

I've seen a few arguments on the web about whether LED downlights are ok with certain types of insulation etc.

 

 

 

Anyone have any knowledge on this?





Nothing is impossible for the man who doesn't have to do it himself - A. H. Weiler

Create new topic
1980 posts

Uber Geek

Trusted
Subscriber

  # 2336276 13-Oct-2019 14:24
Send private message

LED's need a small driver unit to convert ac to dc... but they dont draw much power anyway, so I doubt the heat is that much. Still something to think about.

 

 

 

Your insulfluff might have become dust though.... have you had it checked?





________

 

Antonios K

 

Click to see full size




3019 posts

Uber Geek


  # 2336277 13-Oct-2019 14:30
Send private message

antoniosk:

 

LED's need a small driver unit to convert ac to dc... but they dont draw much power anyway, so I doubt the heat is that much. Still something to think about.

 

 

 

Your insulfluff might have become dust though.... have you had it checked?

 

 

The drivers seem to be all built in to the fittings - so its just a connection to the 230v power lead.

 

Last time I looked the insulfluff was in good condition.





Nothing is impossible for the man who doesn't have to do it himself - A. H. Weiler

 
 
 
 


1069 posts

Uber Geek


  # 2336319 13-Oct-2019 14:46
3 people support this post
Send private message

You can buy downlights rated to have insulation over them. But that rating is for specific types of insulation like fibreglass and rockwool batts. Loose fill paper over insulation is a no no. So move the cellulose elsewhere and you can put some batts over the sections where the downlights are. If you look closely even LED downlights rated to have insulation over them may not be 100% airtight so there is a chimney effect risk without a covering.



3019 posts

Uber Geek


  # 2336327 13-Oct-2019 16:15
Send private message

bfginger: You can buy downlights rated to have insulation over them. But that rating is for specific types of insulation like fibreglass and rockwool batts. Loose fill paper over insulation is a no no. So move the cellulose elsewhere and you can put some batts over the sections where the downlights are. If you look closely even LED downlights rated to have insulation over them may not be 100% airtight so there is a chimney effect risk without a covering.

 

That might be an option - move the insulfluff from the area immediately around the light and get glass/wool fibre sheet to cover a properly rated LED fitting.





Nothing is impossible for the man who doesn't have to do it himself - A. H. Weiler

15557 posts

Uber Geek

Trusted
Subscriber

  # 2336345 13-Oct-2019 17:11
Send private message

Go talk to a lighting store or electrician and find someone clued up. Get insulation cover rated fittings. Mine have an external driver that sits on top of the insulation.


1069 posts

Uber Geek


  # 2336475 13-Oct-2019 22:16
Send private message

"Loose fill paper over insulation is a no no." should've said loose fill paper over downlights is a no no. I think the concern is some types of insulation are prone to melting or having a lower ignition temperature or are fine enough to migrate into inside the lights. It's almost theoretical but better safe than sorry.

 

Insulation rated downlights are IC or IC-F rated. F is a tighter standard as explained here

 

http://www.pierlite.co.nz/wp-content/uploads/IC-vs-IC-F-Differences-Explained.pdf

 

https://www.thelightingcentre.co.nz/Articles/downlightstandard.htm

 

 

The Switch brand is good but you'd pay a premium although trade discounts from wholesalers can be substantial.

 

 

Downlights have become popular but 15,000 hours on cheaper units isn't as long as it sounds for a fixtured lumnaire.

 

 

I do recommend installing a dimmer at the same time. Underdriving them some of the time will let them last much longer and it negates the risk of overestimating the number of lumens required. Quality trailing edge dimmers should be used with LEDs if at all possible. I got the Kiwi brand as it seemed to be better quality.

Create new topic



Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Netflix releases 21 Studio Ghibli works
Posted 22-Jan-2020 11:42


Vodafone integrates eSIM into device and wearable roadmap
Posted 17-Jan-2020 09:45


Do you need this camera app? Group investigates privacy implications
Posted 16-Jan-2020 03:30


JBL launches headphones range designed for gaming
Posted 13-Jan-2020 09:59


Withings introduces ScanWatch wearable combining ECG and sleep apnea detection
Posted 9-Jan-2020 18:34


NZ Police releases public app
Posted 8-Jan-2020 11:43


Suunto 7 combine sports and smart features on new smartwatch generation
Posted 7-Jan-2020 16:06


Intel brings innovation with technology spanning the cloud, network, edge and PC
Posted 7-Jan-2020 15:54


AMD announces high performance desktop and ultrathin laptop processors
Posted 7-Jan-2020 15:42


AMD unveils four new desktop and mobile GPUs including AMD Radeon RX 5600
Posted 7-Jan-2020 15:32


Consolidation in video streaming market with Spark selling Lightbox to Sky
Posted 19-Dec-2019 09:09


Intel introduces cryogenic control chip to enable quantum computers
Posted 10-Dec-2019 21:32


Vodafone 5G service live in four cities
Posted 10-Dec-2019 08:30


Samsung Galaxy Fold now available in New Zealand
Posted 6-Dec-2019 00:01


NZ company oDocs awarded US$ 100,000 Dubai World Expo grant
Posted 5-Dec-2019 16:00



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.