Toshiba to release 93 lm/W LED bulb

Oct 1, 2009 Toshiba Lighting & Technology Corp will release high-output LED light bulbs with a total flux equivalent to that of a 60W incandescent lamp.

Equipped with a large-size LED package that measures approximately 15 x 15mm, the natural white type and the warm white type feature total fluxes of 810 lm and 600 lm, respectively. Both versions consume 8.7W. The luminous efficiency of the natural white LED bulb is 93 lm/W, which is higher than those of any other similar products announced so far.

Toshiba LED chip New bulb is longer than previous version.

Toshiba improved luminous efficiency by dispersing more than a hundred LED chips in a large package to prevent heat from concentrating. For its previous products, the company used Nichia Corp's general-purpose LED package. But, this time, Toshiba developed its own LED package, aiming at a total flux 1.5 times higher than that of the company's former product that is equivalent to a 40W incandescent lamp in terms of total flux.  However, as the brightness increases, so does the total amount of heat. Therefore, the company elongated the chassis by 10mm to 119mm to expand the radiating area. 

Bulb TypeFlux,
lm
Input Power,
W
Efficacy,
lm/W
CRI
(Ra)
Lifetime,
hours
Price,
USD
Natural White8108.793
7040,000100
Warm White6008.769
8040,000100

The company will release the new LED light bulbs Oct 16, 2009, aiming to sell 70,000 units in fiscal 2009.

Source: http://techon.nikkeibp.co.jp


Author:  Yaroslav Oleksenko

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jerry song, 07.24.2013 08:57:57
Find more LED bulbs on: www.ledke.com
Guest, 05.12.2010 18:59:34
How much is the driving current for 93lm/W?
Guest, 02.22.2010 20:02:54
I think the toshiba this design is feasible, multi-chip package can really increase the luminous efficiency, it is undeniable that the increase in the relative prices will, in other words lumen is the money pile up

Personal view
kenny taiwan
Guest, 02.08.2010 16:37:40
LED bulb reliability - HIGH FAILURE RATES

The life span of LED bulbs is vastly overstated by the manufacturers and vendors. Some of the bulbs I have purchased only lasted two weeks at no more than a couple hours use per day. Very disappointing (maybe 30 hours lifespan).

I am a big fan of LED lighting. Choose a bulb that fits the application (lumens and color) and you will be happy. Unfortunately many manufacturers and vendors overstate (I'm being kind here) their products specifications.
I have purchased 45 LED bulbs and have had mixed reliability.
The good news - some are very reliable. I have five LED bulbs outside that have run dusk to dawn for two years with no problems.
The bad news - some bulbs are VERY unreliable. VERY high failure rates.
I purchased 12 of one type LED bulb and 12 out of 12 have failed (8.5W product 47856 from LEDLight.com). 100% failure rate. To make matters worse they are refusing to replace them now.
Beware of LEDLight.com. This company is selling products that they know are defective. No support for failed LED bulbs. These bulbs are very expensive ($20 - $105) and in some cases last only two or three weeks. They refuse to replace defective bulbs. LEDLight.com is selling known defective products and has bad customer service.
ledlight.com, LED, problem, fail, failure, burnout, quit, reliability, unreliable, review
Guest, 12.24.2009 01:02:22
I have a lemnis pharox 6 watt LED bulb. the only problem with this bulb is that it needs more heatsinks to get rid of the heat. When you first put it on, it will be reasonable but it will become dimmer as it warms up. LED efficiency declines as heat increases. Therefore the Led's just need better dissipation. I measured the dimming with a light meter. It will go down by 25% from cool start.

Not good, (or bad heat design). Also these companies lie about the amount of light they put off. not taking thermal effects into account. 800lm should be = to 60 Watt bulb.

I will put better heatsinks on the bulb just because i am bloody minded. LED bulbs are cool and the future and Toshiba seem to be doing normal good engineering/design. Multichip is the answer. Well done Toshiba.

Jon - UK
Dan, 12.23.2009 08:31:01
Pedro,
I believe 93 lm/W already includes driver power factor. I have seen a couple of LED lights with CRI higher than 90. Light quality was not ideal, but it was good enough for me. It seems like you had bad experience with low quality lights. Unfortunately it's very common these days.
Guest, 12.23.2009 04:50:43
it does not look good at all!!!

don't buy the 93lm/w cause the consuption has to condider the driver! how much that is I don't know, they don't tell!

don't forget that the light quality will never be like a full spectrum light source.
(pay no attention and CRI or Ra, that will misslead you - do you know what it means?)
pedro ek lopes
plusaf, 10.15.2009 23:15:53
looking at that lamp, i'm reminded of the first screw-in "fluorescents" of maybe 10-15 years ago here in the US.

straight tubes, folded into pairs of quads, 4-8" tall above the base, and replaceable.

the lamp tube had the shortest life of any component.

later technologies made it a one-piece screw-in and you replaced the whole thing on failure. prices went fr om about $15 down to maybe $5 for a 15-w [consumption] lamp.

today, the spirals are getting smaller and smaller and some even can stand "upside-down" or "bulb-down" fixtures where there's not a lot of ventilation. i've yet to see a bulb-down-mounted lamp last anywhere near the claimed expected lifetime, but i trust that day will arrive soon.

the lamp in the picture above has obviously too many hand-assembled parts to be reasonable in mass production, but those are the first and most obvious things to automate. then shrink the overall package size.

all-optimized to then-current design and manufacturing techniques, i'd trust the cost of that lamp to cross $10 within a few years.

it's a very good start.
good work, all!
Alan, 10.15.2009 22:38:02
Richard,
I assume they are using multi-chip LED array driven at low current to achieve higher efficacy.
richard, 10.14.2009 14:22:45
Looking at the PRs incorrect stated number above with neutral white at 70lm/W, which should be 810/8.7 = 93lm/W and 600/8.7 = 69lm/W I have a hard time to believe any of it.
Especially in this power range and with the normal blue/phosphor LED type as pictured system efficacy has not reached these levels yet. Would be nice to see some independent test lab results.
But if these efficacy is true than I would have to say kudos to Toshiba.
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