LED Household lighting

[rovers1952]

GU10 LED's finally getting cheaper. Bought 4 from Ikea Rhodes @ $14.99 ea.
specs...4watt, 125lm. 3000kelvin, 38 degree single beam, 20,000 hrs. The chrome shroud on original fitting even fits snugly on new LED. Have installed the 4 over kitchen island bench. Not at bright as original 35watt halogens but acceptable.
Will wait for the three spot 9 watt variety to get cheaper before replacing the remaining 6 over the kitchen work area.

[bee utey]

There are huge numbers of LED downlights on ebay, I have bought bunches of 9W ones for varoius people, and they have been great so far. These might be up your alley:

6 x GU10 9W 3x3w DIMMABLE LED DOWNLIGHT COLD WHITE 240V (eBay item 250784690517 end time 10-Mar-11 13:22:06 AEDST) : Home

[101RRS]

Are there LED globes that can replace current low voltage halogen globes??

Or do you need to replace the entire fitting.

Garry

[d2dave]

There are huge numbers of LED downlights on ebay, I have bought bunches of 9W ones for varoius people, and they have been great so far. These might be up your alley:

6 x GU10 9W 3x3w DIMMABLE LED DOWNLIGHT COLD WHITE 240V (eBay item 250784690517 end time 10-Mar-11 13:22:06 AEDST) : Home

I have a question. If I get 3 25w incandesant globes and put them together am I going to get the same light as one 75w globe. I would have thought not but I could be wrong.

However if I am right this would mean that the above globe would use 9w of power but only produce a larger amount of 3w light.

Anyone able to answer this.

Dave.

[bee utey]

Are there LED globes that can replace current low voltage halogen globes??

Or do you need to replace the entire fitting.

Garry

Most of the 9W led lamps I bought were the 12V MR16 style designed as a drop-in fitment for 12V halogens. I have been wiring mine to a solar charged 12V system to save electrician's costs. They appear on ebay for $20 to $40 each, depending on who just imported a gross of them.

These are mid-range priced ones from a good seller:

6X 9W MR16 3x3w XR-E 12V CREE LED DOWNLIGHT GLOBES (eBay item 320593958630 end time 21-Mar-11 19:37:46 AEDST) : Home

[bee utey]

I have a question. If I get 3 25w incandesant globes and put them together am I going to get the same light as one 75w globe. I would have thought not but I could be wrong.

However if I am right this would mean that the above globe would use 9w of power but only produce a larger amount of 3w light.

Anyone able to answer this.

Dave.

Globes are rated in watts of power consumption, ie their input. Light output is rated in lumens. LED lamps are something like 5 times as efficient as tungsten filament globes at producing light, so a 9W LED is close to a 40W globe in output. Same as compact fluoro globes but they go to full output instantly when turned on. And they don't get very hot so can't start fires like the halogen lamps.

[rovers1952]

Thanks Bee Utey...had a look...getting closer now. Will get cheaper but a finite market because the lamps last virtually a lifetime....

garrycol...yes they are retro fit...just replace old globes...

and mr Whippy...I am hoping that the the 3 x 3 watt in the single globe delivers three times my single spot 3w globe....and something close the old halogen 35 - 50 watt GU10.

These lamps over time will put the power companies out of business!!!!

[d2dave]

Globes are rated in watts of power consumption, ie their input. Light output is rated in lumens. LED lamps are something like 5 times as efficient as tungsten filament globes at producing light, so a 9W LED is close to a 40W globe in output. Same as compact fluoro globes but they go to full output instantly when turned on. And they don't get very hot so can't start fires like the halogen lamps.

I do understand this but does not answer my question.

I will put it this way. Is an LED globe with three x three watt globes as bright as one nine watt LED

Dave.

[101RRS]

Yes - three globes are brighter than one, but not three times brighter - but don't ask me why?.

[bee utey]

I do understand this but does not answer my question.

I will put it this way. Is an LED globe with three x three watt globes as bright as one nine watt LED

Dave.

Oh, yes, so long as you are comparing similar chips. Cree XR-E 3W chips are amongst the best currently available. Technology changes all the time so improvements will make earlier types obsolete. Currently the 10W MC-E single chip lights are around $60 and have 500 lumen output compared to 400 lumen for the 3x3W ones.