Browse Forums Eco Living Re: LED lighting 12May 26, 2009 3:07 am Thanks, that answers my question... I guess it was kinda obvious - I was thinking that light emitted by the LED might spread less, like LASER... I'll stop wondering about that now. I've been looking for a supplier for these, there are lots coming out of HK (on ebay), any one have experience with these? Reliable Cheers, S Wishful Builders... Re: LED lighting 13May 26, 2009 11:47 am Tribasus Thanks, that answers my question... I guess it was kinda obvious - I was thinking that light emitted by the LED might spread less, like LASER... I'll stop wondering about that now. I would still keep wondering. Good lighting efficiency is not only about lumens and watts. Beam distribution is important as well. This study modelled LED only lighting for a conference room and found it would be challenging to provide the correct lighting distribution. In the end it was found to be less efficient than other standard systems involving fluorescents and halogens. http://www.lrc.rpi.edu/programs/solidst ... -43_Gu.pdf Re: LED lighting 14May 28, 2009 5:48 pm Hi Guys , have a look at this web site www.hafele.com.au once there go to the Online catalogues and look for the reflections lighting catalogue ,this can be downloaded and is only about 2 megs. Keep you eyes open as I was showed a new 9 watt Led ceiling light that is 95 % as bright as a 50 watt halogen .There is a Led driver and this can run one or two lights . It is only 18 watt driver . Remember most of the high power led`s are run on 700 m/a and these will not work with old halogen transformers as they will blow the led`s immediatley. This light is a complete ceiling fitting .There are two types one with a gimble for commercial and a fixed version ( 5 * Star rated for new homes ) Enjoy and hooray for LED lights . Contact Hafele if you need any other info. Re: LED lighting 15May 29, 2009 1:58 am fernbrae Thanks - that is a sweet as resource (for the lazy amongst us here is a direct link to the download or online versions ) So, what's the deal with transformers... looks like I've bought a house with my better half. House is from a large building / development company and we are hoping they can install LEDs instead of the halogens that are specified... any tips? I gather this is something you'd do during building as you need access to ceiling cavity to swap over if upgrading at a later date... ? Wishful Builders... Re: LED lighting 16May 29, 2009 10:16 am The deal with transformers is that they will not run the LED lights . They are completely different to Led drivers . Led lights require constant current and variable voltage . Halogen is constant voltage and variable current. Have you looked at any of the LED ceiling lights ?? What area of Australia are you ?? If you give me and e-mail address I can send some ingormation on the new 9 watt ceiling lights that I have seen . I know these are as bright as a halogen and there is a dimmerable option ,this is not the same as we know for halogens as the dimmers for halogens will not work with Led`s. THis option is by switching the on and off switch on and off several times and the lights will dim from 9 watts to 7 watts to 5 watts and 3 watts. This is just how it is ,no other options at this time. One driver is 18 watts so this will run two lights and plugs into a normal 10 amp GPO ,same as is on the wall.( but this would be in the ceiling and attached to your wall switch. ) For switching the lights on and off. Rgds Greg Re: LED lighting 17May 29, 2009 4:09 pm Thanks Greg - PM sent. One of the things that I really want to know is what would be involved with taking a brand new house and removing all halogens and replacing with LEDs... For example: * has anyone done this - what would they do differently * would the drivers need special placement in ceiling cavity (suspect not) * do the drivers fit through the holes left over from the halogens * what is the cheapest approach * what is the most preferred approach from a technology perspective * if I choose option A would it preclude option B, C & D * does anyone have experience dealing with a builder on these issues (horror or delight?) * any tips, tricks or things to consider Regards & thanks , S Wishful Builders... Re: LED lighting 18May 29, 2009 9:41 pm Tribasus One of the things that I really want to know is what would be involved with taking a brand new house and removing all halogens and replacing with LEDs... Here is an article about LED lighting from a Eco Retailer: http://www.eco-smart.org/presentations/ ... cation.pdf It emphasises the fact that LEDs provide better directional (task) lighting than general lighting e.g. car headlights, traffic lights, accent lighting, workbenches, desks The Wikipedia primary references on luminous efficacy suggest that LEDs are generally better than CFLS, the difference with fluorescent tubes is not that great. LEDs might be appropriate over a kitchen bench or desk but they don't seem adequate to provide the right kind of illumination for general use areas. Re: LED lighting 19Jul 06, 2009 6:19 pm Hi , have not received PM, fernbrae5@bigpond.com please send again, I will send more information regarding the lights There are very simple ways this can be acheived , the drivers for the led`s are not large and will fit in the holes the the halogens have . The dirvers are about the same size. rgds greg Re: LED lighting 20Aug 01, 2009 11:13 am In fact, many LED products like illumination tube bulb had gone into using, it is good to replace the traditional incandescent lamp. I am working in a LED factory Shenzhen, China, you would better buy from the Hongkong seller. But if you want the detailed information, maybe you could go to w w w.kutop.c o m, there are some articles about LED applications. 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 28875 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 8878 |