Browse Forums Lighting + Lighting Design Re: LED Lighting for a Standard House ? 3Jan 03, 2013 11:09 pm Building with Jandson Homes - Eclipse 18. http://adgnetworks.blogspot.com/ Re: LED Lighting for a Standard House ? 7Jan 04, 2013 9:43 am Chart: LED Comparison Guide - LED vs Halogen vs Incandescent http://www.ledcentral.com.au/led-lighting-guide#22 This helps a little. Re: LED Lighting for a Standard House ? 9Jan 04, 2013 9:47 am LED vis a vis Incandescent Globes - see bottom of page: http://www.designrecycleinc.com/led%20comp%20chart.html Re: LED Lighting for a Standard House ? 10Jan 04, 2013 9:53 am So, how do we convert lumens to watts ... http://www.ehow.com/how_8113796_convert ... watts.html A lumen is the unit of measure used to enumerate the amount of light coming out of a lightbulb. A watt is a unit of power. The wattage required to generate a lumen varies depending on the type of bulb. Incandescent bulbs are the least efficient of the household bulbs. Compact fluorescent lightbulbs (CFLs) and LED bulbs are significantly more expensive, but they are more efficient and last longer. Divide a bulb's lumen output by the watts used to get a lumen-to-watt ratio. From there, you can calculate usage cost. Instructions 1 Divide 1,500 by the wattage of your bulb. As benchmarks, for an incandescent bulb, an average wattage for 1,500 lumens is 100; for a CFL, the average is around 25 watts; for LEDs, the average is 18 watts. Thus average lumens per watt figures are 15 for an incandescent bulb, 60 for a CFL and 83 for an LED. Different brands of bulbs may have slightly different ratios. 2 Determine the wattage for a single lumen in 1,500 lumen bulbs by dividing the wattage by 1,500. For the above-rated bulbs, the incandescent weighs in at 0.067 watts for one lumen. The CFL needs 0.017 watts for a lumen. The LED requires only 0.012 watts for a single lumen of light. 3 Calculate the cost per 1,500 lumens by figuring in power costs. You need to add in a time factor to measure consumption. Use one hour, as that is the time base for the kilowatt-hour measurement used by utilities. Divide the watt figure by 1,000 and multiply the answer by your utility's kilowatt-hour price. For an average incandescent, at 16.5 cents per kilowatt-hour, 1,500 lumens for an hour runs 1.65 cents. A CFL and an LED would average around 0.41 cents and 0.30 cents, respectively. Simple really ... Re: LED Lighting for a Standard House ? 11Jan 04, 2013 10:01 am I think maybe a keen point that I've seen is that you probably want dimmable since most new LED's have a very bright singular source secondly a point that was brought up in a few other threads is that you want to avoid the spotlight style LED's for bedrooms as they have been known to end up shining directly into eye's, maybe some of the opaque lens equiped versions? anyone care to comment? lastly in the specs a good thing to get right is the CRI, this is essentially how close to daylight the LED is producing, this has a big effect on how the colours look of everything that's in your home, I'm hoping to go with a CRI of 90+ everywhere and with a bit of luck the Wattsaver products as they seem to tick all the boxes I'm after. http://wattsaver.com.au/DL7-1400.html 108 lumens/Watt is quite exceptional efficiency! about the only other planning stuff you may want to look at is if you can/want to use a single transformer for a whole bundle of lights (in theory better than buying one transformer per light) and of course that you need to leave enough space around the LED heatsink so it remains cool. Slooowwwwly getting a Manhatten 35 in Middleton Grange Re: LED Lighting for a Standard House ? 12Jan 04, 2013 10:07 am So - if I wanted an equivalent to a 75 Incan globe in a LED ? To get 1500 lumens I'd need about 18 watts. And I get about 83 lumens per watt. so a 75 equivalent would need a LED of approximately = 13 watts. A 60w globe = LED 10/11 watt. Re: LED Lighting for a Standard House ? 13Jan 04, 2013 10:12 am something that's been irritating me about LED's is how bad the drivers are... to make 13w they are actually drawing 16w! that's only 77% efficient.... power supplies in the servers we use at work are not readily available with 94% efficient, get with it! Slooowwwwly getting a Manhatten 35 in Middleton Grange Re: LED Lighting for a Standard House ? 14Jan 04, 2013 10:12 am Thanks MR2. Quality is another issue. Is it a problem with LED kits/globes in Australia ? I've had prices ranging from similar to double. But - is double better ? Is there a brand name. Are the 3 / 5 style globes better ? I guess I'm asking someone who has installed them to give a feedback on their selection. I've been told to read older threads - but most don't give the answers - just raise more questions. Are Phillips better than the CREE we read about. Are the wholesale places selling quality products - when they are half the price ? Re: LED Lighting for a Standard House ? 15Jan 04, 2013 10:14 am MR2 something that's been irritating me about LED's is how bad the drivers are... to make 13w they are actually drawing 16w! that's only 77% efficient.... power supplies in the servers we use at work are not readily available with 94% efficient, get with it! So - does this mean buying better quality is better - in the long run ? Maybe the drivers in cheaper kits are not of a high quality - thus prices can be set lower ? Re: LED Lighting for a Standard House ? 16Jan 04, 2013 10:19 am well this is where you get stuck, alot of the time you need to go with whatever driver the manufacturer recommends(for example the DPL-1400 needs a 42v source), else you get issues with pulsing etc when you dim below a certain level (you also need to go with the type of dimmer they recommend) but in the long term less energy thrown into heat (what most of the unconverted energy ends up as) will bring your bill down... by how much?? probably not enough to be worth it if adding 10% efficient to a converter doubles it's cost, but then if your making a converter with higher quality components will that mean it lasts longer? I know when I've replaced drivers the ones that have been working for a few hours get damn HOT, I'd rather not have that heat in my ceiling! Slooowwwwly getting a Manhatten 35 in Middleton Grange Re: LED Lighting for a Standard House ? 17Jan 04, 2013 10:27 am going a bit off the planet here but lighting is one of those things I think solar could affordably tackle, just grab a few good batteries in series (get you up to more line length friendly voltage) with some DC to DC converters and just run wiring down from the roof http://wattsaver.com.au/Jupiter_dimmabl ... river.html enough of my waffling on though. Slooowwwwly getting a Manhatten 35 in Middleton Grange Re: LED Lighting for a Standard House ? 18Jan 04, 2013 10:27 am Thanks for that. I guess its all worth it ... Re: LED Lighting for a Standard House ? 19Jan 04, 2013 10:28 am MR2 going a bit off the planet here but lighting is one of those things I think solar could affordably tackle, just grab a few good batteries in series (get you up to more line length friendly voltage) with some DC to DC converters and just run wiring down from the roof http://wattsaver.com.au/Jupiter_dimmabl ... river.html enough of my waffling on though. No - go for it - I'm starting from nothing so its all grist for the mill. We will have solar water and electricity - so why not the lights ! Re: LED Lighting for a Standard House ? 20Jan 04, 2013 10:31 am I've worked out if I save 25% of my power on the solar water, 70-75% with the solar electricity, 20% with the LEDS, and with my northerly aspect and solar efficient house - ie batts, windows, etc, and payment discounts for direct debit, early payment etc etc, I'll own the power company in a year or so ... 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