PowerSwitch Main Page
PowerSwitch
The UK's Peak Oil Discussion Forum & Community
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Energy saving lamps to replace halogen
Goto page Previous  1, 2
 
Post new topic   Reply to topic    PowerSwitch Forum Index -> Electrical, Theory and Practice
View previous topic :: View next topic  
Author Message
PS_RalphW



Joined: 24 Nov 2005
Posts: 5265
Location: Cambridge

PostPosted: Wed Sep 18, 2013 10:07 am    Post subject: Reply with quote

Quick update on my 'new' home.

I have removed almost all the incandescents/halogens. I have replaced 2 halogen ceiling lights in the shower room with B nad Q 12V 3W LEDs. Light is poor and one flickers, but a 90% energy saving, and who cares in the shower? I have fitted heat sinks around the fittings in the roof void, and reduced the uninsulated area to a minimum. How much ventilation does a 3W light need that is only on 10 minutes at a time?

The bathroom has 4 halogen 12V ceiling lights. I may replace these with LEDs but not urgent as the wall light (15W cfl) gives adequate light. However, I cannot access the roof void to fix the obvious holes in the insulation. Grrr. One wall light I use a lot has car type 12V halogen bulbs. I will probably have to replace the entire unit.

I increased the loft insulation from a patchy 100mm to 300mm. I have started insulating the doors (2 mm plywood panels and massive drafts at the edges). I have improvised crude secondary glazing on one window.

Plenty more to do. I have had my first log delivery and booked a chimney sweep. More expensive remedies will have to wait until the finances have stabilised.
Back to top
View user's profile Send private message
therabble



Joined: 17 Sep 2013
Posts: 10
Location: United Kingdom

PostPosted: Thu Sep 19, 2013 9:56 pm    Post subject: Reply with quote

Completely agree about the inset lights. Although I have a fair bit of insulation in the loft there's a huge gap above each light and I can feel a huge draught around them.

I have been looking for something that will meet building regs to cover them and found these:

http://www.electricalcounter.co.uk/products/Fire+%26+Smoke+Alarms/Aico+Fire+%26+CO+Detection/Accessories/Fire+%26+Sound+Barriers/Downlight+Covers/Loftcap+Downlight+Cover+-+Fire%2C+Thermal+%26+Vapour+Seal+%28Small+Size%29/893965040

Problem is they are really expensive and it would have to take a lot of heat loss to get any sort of payback, as I would need 13 in total. I am reluctant to fill them in as the ceiling is too low for most surface mounted lights.

I did read up somewhere of using terracotta plant pots instead and then insulating over the top. As I'm using LED there'd be no heat build up so perfectly safe, but if a future dweller was to switch back to halogen then there's the possibility of overheating. Might still do that though as I'm not planning on selling up anytime soon.

TR
Back to top
View user's profile Send private message
therabble



Joined: 17 Sep 2013
Posts: 10
Location: United Kingdom

PostPosted: Thu Sep 19, 2013 10:01 pm    Post subject: Reply with quote

RalphW wrote:
I cannot access the roof void to fix the obvious holes in the insulation. Grrr.


RalphW,
If your insulation is anything like mine, I just had little "cut outs" where the lights were. Could you remove the bulb, stuff a load of insulation through the hole, and then let it expand above? Might not be perfect but could help a little.
TR
Back to top
View user's profile Send private message
kenneal - lagger
Site Admin


Joined: 20 Sep 2006
Posts: 9817
Location: Newbury, Berkshire

PostPosted: Fri Sep 20, 2013 6:48 am    Post subject: Reply with quote

therabble wrote:
..........I did read up somewhere of using terracotta plant pots instead and then insulating over the top. As I'm using LED there'd be no heat build up so perfectly safe, but if a future dweller was to switch back to halogen then there's the possibility of overheating. Might still do that though as I'm not planning on selling up anytime soon.

TR


The terracotta pots are a good idea but you would want to seal the hole in the bottom, now top, and seal them to the ceiling. With the maximum couple of watts power of an LED there wouldn't be any significant heat build up. If you ever moved make a declaration on the transfer documents and if the new people don't read it it's their hard luck.

By the time you move halogen lights might have been made illegal like tungsten bulbs.
_________________
"When the last tree is cut down, and the last river has been poisoned, and the last fish has been caught, Only then will you find out that you cannot eat money". --The Cree Indians
Back to top
View user's profile Send private message Send e-mail Visit poster's website
adam2
Site Admin


Joined: 02 Jul 2007
Posts: 6214
Location: North Somerset

PostPosted: Fri Sep 20, 2013 8:20 am    Post subject: Reply with quote

If one desires to remove recessed down lights in the interest of avoiding heat loss through the holes, then it may be worth fitting a new type of miniature surface mounted fitting.
These are so shallow in depth that when surface mounted they resemble a recessed down light.

Replacement lamps are available in both LED and CFL types

http://www.nationallampsandcomponents.co.uk/f.php/Light-Fittings/Megaman-PALMLITE-Fittings/Megaman-9W-PALMLITE-Silver-L0501CB/77/193/1226
_________________
"Installers and owners of emergency diesels must assume that they will have to run for a week or more"
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    PowerSwitch Forum Index -> Electrical, Theory and Practice All times are GMT + 1 Hour
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group