Down lights-Fluro V LED

[bennylaird]

Luxeon info here.
http://www.jaycar.com.au/images_uploaded/ZD040X.pdf

[doug1]

The CFLs I have used are Nelson Alladin 15W Warm white they dont specify colour temp

Given that SWMBO HATES flouresent and she accepts these they maybe what you need

Doug

[built4thrashing]

you can use 1watt MR16 LED globes in a standard 12v downlight but you need to use the old iron core transformers. Electronic trannys need a minimum load to fire. Iron core trannys will also allow you to dim the LEDs and you can run up to 40 led downlights of the 1 transformer

[seth]

I tried some CFL down lights but I was very dissapointed with there performance especially their colour. Take a look here:

http://www.heavydutymedia.com/OurRen...ownlights.html

Shame really cause I really wanted to do my thing for the environment.

I've ended up going with 35 watt Halogens instead. The type I obtained claim to be as bright as a 50 standard down light.

I'll try and reduce my energy consumptions through the use of a lamp when I want lower lights and other energy efficient measures in my house.

[seth]

I've had the 35 watt ones installed now, they are fantastic!

[patty]

advice required to help decide which type of light to install on the verandah, I will need about 30 downlights to cover the area.

I have 6 low voltage dimable downlights in the kithchen which use about 70w each and want to use either 240v fluro or led non dimable lights on the verandah due to their low power consumption. Ebay has these for about $21ea which seems reasonable (the 12v's in the kitchen cost $8.50ea).

Does anyone have any experience with the 240v fluro's and led's and are there any differences in the light output. Not concerned about bulb life as by the time they die the price will have changed to who knows what.

Thanks,

[patty]

stringy mate go for the fluros any day of the week especially for a verandah but if you have money to burn go ahead with the leds but you will not get anywhere near the amount of light or the actual spread from leds compared to fluros you can get some nice diffused 2x4 foot fluros i dont know how big your verandah is but 4 x 2x40 w diffused fluros will adequatley cover the average sized double garage spacing them correctly they might not look as cool as recessed downlights but it depends how cool your verandah is and how big your wallet is also mate

[patty]

stringy to cover the area of a double sized garage in leds and get sufficient light output i think you would have to have a mininum of 24 lamps $20 a lamp not including the fitting round about $6 i rekon you would spend about $600 min on light fitting to cover the area duck into your local wholesaler and check prices on 2 x 40 w diffused fluro I think you would pay about $40 each i hope this helps

[patty]

stringy check out led shop online The local wholesaler will charge like a wounded bull for leds but beware there is some cheap and nasty led lamps on line as well... they have some new 5 w leds out now and from what i am led to believe they are the GO also i would suggest to go for daylight instead of warm white colour warm white is a yellowy colour where daylight is more white also look at the 6500k 5 w they look good

[patty]

stringy
I have just replaced 3 x 50 w halogen lights in my hallway and converted them to 1.5w isotronic led lamps which have 18 led per lamp each... I decided on putting them in the hallway as lighting is not so critical and the result.... ablsolute crap look good but... dont even bother changing over you dead set get more light out of a dolphin torch I am contemplating about using some 5 - 7 w versions I saw on e bay and giving them a try the brand of the led lamps is "invironment" but they are $100 bucks each plus some there is also another crew I think called ixl lights and they have a 5 watt version for $27.00 ea... so unless you want to sit on your verandah by moonlight because that is the light ouput i have in my hallway at the moment... dont even worry about changing over in the kitchen you need to have good light ion kitchens

[zathras]

The latest Cree XR-E LEDs are now matching light output of flouro lighting.
80 lumens / watt.
This is about 4 times better than the luxeon can do.

These are 3W LED's, so to compare apples with apples, you'd need a 3W flouro.
I honestly think for mainstream lighting, stick with compact flouro, in a warm white until the LED's begin to really go beyond flouro efficiency and also the price falls to a better match against flouro.

The LED light output efficiency improvements will happen soon I'd suspect, but the pricing will still be at least 4x the flouro I'd suspect.

[Stringy]

Finally got to a lighting showroom and compared the CFL's to Luxeon LED, the Luxeon LED's are deffinetly the way to go but price is prohibitive.

Halogen; 70w, $8.50per fitting, 1000hour life.

Luxeon LED; 3w, 60 to 70% output of Halogen downlight, Narrow beam. $60per fitting. 40 to 50,000 hour life.

CFL's; 15w, 30% output of Halogen downlight, $30 per fitting/meggabux if I want them dimmable $70per bulb, 10,000 hour life. Electrical wholesaler/lighting showroom had lots of complaints about these and were not keen to recommend them.

To light up my verandah will cost $1800 with the LED's. I will have to wait untill the price becomes realistic, although looking at bulb life, value is prettey good.

the verandah is going to be wired to accept downlights in the future, but at the moment I will have second hand fluro battons $0, fitted. At this price I can afford to have a few broken from the kids playing.

[SilentButDeadly]

Stringy........with respect, I think you've been misquoted.

Fitting cost for the GU10 240V CFL downlight is the same as that for a GU10 240V halogen downlight......about $8.50. It's the same bloody thing!!!

And the dimmable CFL's are about $35 to $40 per bulb......not $70!!!!

You also forgot to mention that the CFL downlights have a 110 degree wide beam compared to the typically 35 to 75 degree beam of halogen....which tends to make the CFLs seem dim by comparison. However, there are reflector fittings available for the CFLs to narrow the angle.....

Bear in mind that the Luxeon Stars (actually Phillips LumiLEDS) are the ducks nuts of ultra bright LEDS to date but there's a transformer or two (these ones http://www.luxeonstar.com/item.php?i...o=913700181903 ) behind those unlike the halogens and CFLs.......oh and I personally don't believe the hour rating unless there's the mother of all heatsinks attached to LEDS themselves......it'd be more like 1,500 to 5,000 hours if they aren't allowed to dissapate the tonne of heat they generate......

If you like the Luxeons so much and have some fluro fittings then why not the best of both worlds.....the Luxeon fluro http://www.luxeonstar.com/sub_catego...&link_str=1429 AU$180 straight from Luxeon

[zathras]

Luxeons are now about 3 years old.

In the meantime CREE have outstripped them in efficiency, and also the O-star is a similar performance to the CREE.

When these better LEDs do start appearing in mainstream fittings the luxeon will fall away very quickly.

Heat is a problem with ALL light fittings, halogen being the hottest.
Poor efficiency is directly related to wasted heat energy. The aim is to produce light with minimal heat. A filament burning a several hundred degrees C is far from being efficient, a lot of energy is simply wasted as heat. Certainly far more than the LED produces.
The "tonne of heat" from the LED is insignificant to that of the halogen!

Most halogens too are driven by transformers, electronic or iron core.

Unfortunately I do agree though that LED's are simply not price effective at the moment, and probably not in the foreseeable future either.
Good to play with for camping etc, but for domestic use everyday, not really practical to fit the house out with.

[bennylaird]

"Osram has developed a light-emitting diode (LED) spotlight that achieves an output of more than 1000 lumens. That’s brighter than a 50W halogen lamp, making the device suitable for a broad range of general lighting applications. The Ostar Lighting LED, scheduled for release within months, can provide sufficient light for a desk from a height of two metres, for example. Its small size also enables the creation of completely new lamp shapes."

Silicon Chip Mag.