Toshiba releases high efficiency LED light bulb

[slebans]

Toshiba Develops New Heat Dissipation Structure for LED Light Bulb:
http://techon.nikkeibp.co.jp/english/NEWS_EN/20111028/200001/

This bulb is being released in a few weeks. It looks like a normal frosted A19 incandescent bulb.

60 watt equivalent
10.6 watts
Warm White: 810 lumens(76 lumens per watt)
Cold White: 1000 lumens(94 lumens per watt)
Light distribution angle is 260 degrees

Stephen Lebans

 

[deadrx7conv]

I wonder how much it costs?

I'm glad to see improvements in efficiency. The Philips 12.5w alien head bulb produces 800lm and Sylvania has a 12w 810lm 'snow cone' 60w equivalent(both warm white). Drop the wattage, keep the output the same, and the bulb will look prettier and be more acceptable. Time to move away from 'snow-cone' bulbs!!!

With the improvements in output while reducing power used, I believe that SwitchLighting missed out on their liquid filled bulbs. None in stores yet and won't need that liquid complexity in a year or so.

It would also be nice to have that Toshiba bulb in "905lm NEUTRAL" coloring.

 

[Lynx_Arc]

I would say 76-94 lumens/watt is "higher" efficiency but not "high" enough. IMO it is more akin to what "normal" efficiency for what LEDs can do now. Since we have XM-L LEDs touting 150+lumens/watt cool white, 94 is nothing spectatular but not bad compared to the dismal 30-70 lumens/watt offerings in stores. IMO LED bulbs won't really take off until they start making them around 120 lumens/watt and start to advertise them as energy saving over CFLs instead of incans.

 

[deadrx7conv]

Problem with LEDs touting anything is that they forgot to include the driver, transformer, power supply...inefficiencies in their calculations. And, in mass production, how many 1w LEDs do you want to wa$te trying to build a single light bulb?
So, we won't see bulbs that match 'LED' data specs EVER!
How many XPG S2's or S3's are there? Availability?
Hows the supply on those so-called XM-L at 160lm/w? Hows the color, temp, and CRI on those LEDs? and the consistency? I don't want any 'green' edging in my lighting!
How much are you willing to pay for a light bulb? $3, $10, $20 or $100???
Cree XTE's are really nice too. But, who wants to light up a room in "royal blue"?

76-94 lm/w is excellent. Could it be better? Sure, maybe will get 10-20% more lm/w next year. Maybe the bulb won't cost $100 each too.

They are balancing LED supply, heat sinking, lm/w capability, and probably the biggest variable, COST, to give us that bulb. We've gone from 12.5w to 10.5w in one year while improving output(sacrificing CRI and bumping up the K), and while maintaining warm white bulb comparison. If we can get that same bulb down to 9w or 8w in the next couple years, without making it more expensive, and while making it available to the masses, we'll be doing really good.

 

[blasterman]

XM-L's aren't typically used for AC applications because of their high current requirements. You need to drive the buggers at a couple amps to make them cost effective, and then your cost goes into your driver. Heck, good luck finding an XP-G in this package. The super premium LED's are typically too expensive for LED retrofits anyways

XT-E's are intended for remote phosphor applications.

 

[kaichu dento]

Now were finally getting somewhere with LED bulbs. Can't wait to see the prices and for them to finally reach the 100 watt replacement levels.

On the box it says 明るく、きれいに、光が広がる, Brighter, more beautiful, spread the light!

 

[Vesper]

This is cool stuff. I find myself coming more and more over to the fixed lighting forum. This tech will be fun to watch develop.

 

[JohnR66]

To achieve 94 lumens/watt I estimate the LEDs are no less than 120 l/w and probably up in the 130 range. As stated, driver and fixture efficiency come into play. Also the LEDs are at a higher than room junction temp. The 25 Deg C rating that some manufactures use is not very useful for typical LED use.

Like to see 3500 and 4100K color temps available.

 

[LEDninja]

slebans,
Have you checked out the Home Depot Canada LED light bulb page lately?

In addition to the 9W LED "A" Dimmable Soft White 470 lumens. Works out to 470/9=52 lm/W. I believe you have that.

Philips has a new 6W A19 Non-Dimmable Bright White (40W) - LED Bulb 450 lumens. Egg yolk style. 450/6=75 lm/w.

-

Philips also have a 7W LED "A" Dimmable Soft White 240 lumens. 240/7=34 lm/w.

and 4W A19 Non-Dimmable Bright White (25W) - LED Bulb 250 lumens. 250/4=62 lm/w.

-

Looks like the dimmer circuit adds 3W to the bulb. Uh Bright White could also mean cool white which increases efficiency.

-----

Cree is claiming their CR24, CR22, CR14 fixtures to replace 2'x4', 2'x2', 1'x4' fluorescent fixtures are in the 90-110 lumen range 3500°K and 4000°K.

 

[slebans]

slebans,
Have you checked out the Home Depot Canada LED light bulb page lately?

Does every day count?<grin>

I have bought close to 48 Philips BR30s from my local Home Depot store. We also purchase bulbs from Home Depot in the US(via a cross border shopping service). Lighting Science Group's BR30s are purchased from a US distributor(still waiting for the Cool Whites to arrive).

All of the bulbs have been on for a minimum of 20 hours a day for the last couple of months without a single failure. Starting this week the controlled environmental test room is running at 30 degrees celsius with a constant relative humidity of 70-75%. We will see if these new conditions cause any failures.

On a funny note - my daughter brought home a Philips bulb that we did not know was non dimmable. When placed on the DMX dimmer circuit it went into disco party mode - with no apparent damage to the bulb.

Stephen Lebans