Browse Forums Eco Living Re: LED lighting 26Aug 20, 2009 1:46 pm Casa2 On this last itme, most of your lights will never have to be repalced - they'll tear the building down to build a new one before you replace the majority of the lights. Casa2 LEDs are better than this graph states. You can get 100 lumnes per watt from a good quality LED. From the Philips Luxeon range website: They quote a wide range of luminous efficacies for White LED ranging from 63-100 lumen/W. http://www.philipslumileds.com/products ... bel-white/ Compared this to CFLs 50-70. Fluoro tubes 70-100. Normal incandescent 15-20. If you look at the advertised equivalent light outputs of most retailed LEDs it generally is around 10W LED = 50W Halogen. This is not much different from CFLs. The useful life is defined conventionally as when light output falls to 80% of original (not to zero). This is operating temperature dependent. Philips reckon 18000 hrs (Fluoros may be 10-15000) http://www.philipslumileds.com/technolo ... enance.cfm It is promising technology but as you say cost doesn't make it a huge economic or energy advantage. Despite improvements in luminaire design, LEDs are much more directional (more like downlights then pendants) than other forms of light sources. I would really like to see how someone would arrange a series of LED luminaires for a conventional home to provide adequate general illumination. I'd suspect it wouldn't be just a case of swapping over all your usual lights to LEDs. It would require a configuration that requires a bit more design and forethought and more lighting outlets. Building Standards; Getting It Right! 1. optional, you can but normally just use the earth from the main switch board 2. should be enough but the distance determines voltage drop - sparky should work it… 1 28814 I have a really long hallway which is 1100mm W x 11500mm L I would appreciate if anyone can give suggestions to light it up with Linear LED lights that goes from wall to… 0 8814 |