I'm basically sold on the idea of installing CFL downlights instead of halogen.
What I need to know is whether a 11w CFL is going to be able to produce as much light as a 50w halogen.
Hope someone can help.
Browse Forums Eco Living Re: CFL vs Halogen downlights 4Feb 19, 2009 12:34 pm 'We make a living by what we get, but we make a life by what we give.' - Winston Churchill Re: CFL vs Halogen downlights 5Feb 19, 2009 1:26 pm digga123 I is whether a 11w CFL is going to be able to produce as much light as a 50w halogen. http://en.wikipedia.org/wiki/Luminous_efficacy Re: CFL vs Halogen downlights 6Feb 19, 2009 2:10 pm we have CFL lights in our current rental, ill need to confirm what wattage they are, but as they have reflectors built into them they provide more than enough light Blog - http://snakedr.blogspot.com/ Build Thread - viewtopic.php?f=31&t=12084&p=307406#p307406 Status - PCI 15/10. Things nearly done. Re: CFL vs Halogen downlights 7Feb 19, 2009 2:37 pm billdsl we have CFL lights in our current rental, ill need to confirm what wattage they are, but as they have reflectors built into them they provide more than enough light As you indicate there are other factors that contribute to the overall lighting 'effectiveness'. Its not all just about lumens. Beam width is also a consideration and how the overall illumination is distributed. Try this site for my ideas: http://www.elflist.com/articles.html Re: CFL vs Halogen downlights 8Feb 19, 2009 6:42 pm When it comes to getting the right level level in your house, all that matters is lumens.
A 11W Megaman gives out 210 lumens (19 lumens/Watt) A 50W halogen gives out about 800 lumens (16 lumens/Watt) Larger CFLs are OK, but the ones the size of halogens are useless - they are no more efficient and will not last any longer than halogens when installed as downlights (despite the claims). Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: CFL vs Halogen downlights 9Feb 19, 2009 7:08 pm Casa2 When it comes to getting the right level level in your house, all that matters is lumens. In lighting design lux is the chief variable to consider - lumens per unit area (or illuminance). Recessed downlights are the least efficient method. They require higher a level of lumens per square metre than pendants or ceiling mounted lights. A proportion of this lighting energy is directed non-productively toward the fitting. Additional inefficiencies arise due to the inability to adequately insulate the house from heat loss around the recess. For general lighting purposes, a house can be illuminated more effectively when the light is distributed over a broad area. Higher intensities are mainly required in task (kitchen prep, study, workbench) or accent lighting. The main appeal of downlights seems to be the ability to generate a diffuse lighting scheme without direct glare from a fitting. http://www.energysmart.com.au/brochures ... ghting.pdf http://www1.sedo.energy.wa.gov.au/uploa ... ght_26.pdf Re: CFL vs Halogen downlights 10Feb 19, 2009 7:49 pm Hope I can help.
The 11W GU10 Fluoro Lamps are ordinary to say the least. They are no way near the output of a 50w halogen lamp. The are 18w lamps available to fit into the standard gimble (downlight) but they protrude out the bottom of the fitting are look terrible. In the next couple of months a company called Nelson Lamps is releasing a 22w GU10 fluoro lamp to fit in the standard gimbles. These will have the electronic components of the lamp moulded into the lead so the lamp is physically smaller. Another alternative is to use a downlight that takes a ES (screw in) CFL like this one ... Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ This uses a 20w CFL so it is equal to about 75-100w incandescent. You can get these for about $25-30 ea. They are quite popular at the moment. Hope this helps Re: CFL vs Halogen downlights 11Feb 19, 2009 8:31 pm hawks,
Thanks for the info. You're at the cutting edge with your information. The Nelson Lamps 22W GU10 CFL sounds interesting. Do you have any info? Also, for the light fitting you showed the picture of, do you have any details. Also, what do you think about the "light leak" to the side where the lamp is inserted. I imagine about 25% of the light ouput goes to lighting the space above the ceiling. Cheers, Casa Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: CFL vs Halogen downlights 12Feb 20, 2009 2:59 am I visited a local lighting shop and was lucky enough to see the difference between various options for downlights. They had received so many queries in regards to cfl downlights that they decided to setup a small room with 11w cfl's, 15w cfl's and 50w halogen's.
Until I seen this demonstration I was adamant that 11w cfl's were going to be the main light used in my living areas but now my view has been changed. These lights are pathetic. I will now go with a bigger cfl/fitting and probably use a 15w globe if not bigger. Troy Re: CFL vs Halogen downlights 13Feb 20, 2009 5:24 am Casa2 hawks, Thanks for the info. You're at the cutting edge with your information. The Nelson Lamps 22W GU10 CFL sounds interesting. Do you have any info? Also, for the light fitting you showed the picture of, do you have any details. Also, what do you think about the "light leak" to the side where the lamp is inserted. I imagine about 25% of the light ouput goes to lighting the space above the ceiling. Cheers, Casa Hi, the Nelson Lamp has not been released yet, but when it has I will let you know. The other fitting is from http://www.sunnylighting.com.au. As for the light leak, you can slide the lampholder back and forwards to suit different lengths, so it would be best to check the fitting out in the shops to tell for sure. Re: CFL vs Halogen downlights 14Feb 20, 2009 5:43 am These were the light fittings I was looking at yesterday.
http://cla.net.au/cla_catalogue.pdf They are pictured under Energy Saving Down Lights. Troy Re: CFL vs Halogen downlights 15Feb 20, 2009 6:05 am Has anyone ever used one of these kits http://www.neco.com.au/product.asp?pID=975&cID=10 - or something similar?
How would you rate it? Troy Re: CFL vs Halogen downlights 16Mar 06, 2009 2:36 pm hawks Hope I can help. In the next couple of months a company called Nelson Lamps is releasing a 22w GU10 fluoro lamp to fit in the standard gimbles. These will have the electronic components of the lamp moulded into the lead so the lamp is physically smaller. From what I hear this is due in 12 weeks and is twice as bright as a megaman 11W GU10 Fits fixed and gimble lights. Possibly sold as a kit.. Re: CFL vs Halogen downlights 19Mar 12, 2009 2:32 pm I just visited another local light shop and discovered this downlight kit. They told me it was very new. Only come in about 2 weeks ago.
http://www.buysterlighting.com.au/Havit ... V1204.html Troy Re: CFL vs Halogen downlights 20Mar 12, 2009 9:04 pm digga123 I just visited another local light shop and discovered this downlight kit. They told me it was very new. Only come in about 2 weeks ago. http://www.buysterlighting.com.au/Havit ... V1204.html Hard to tell what wattage it is. They mention 18W halogen,but it's a CFL!!!!! Demolition August 2009, Construction Started September 2009, Completed December 2010 |