Pharox: 3.4W LED = 40W incandescent bulb

[PhotonBoy]

http://www.lemnislighting.nl/html/home3.html#nieuws

"...Lemnis Lighting, a technology company focussed on the lighting market and managed by two members of the Philips family, introduces a new lamp today. This new lamp has a 90% lower energy consumption when compared to a standard 40 Watt light bulb. The new LED lamp, named Pharox, has a life span of over 50,000 hours and can be used in and around the home. The Pharox lamp emits a warm white light and is environmentally friendly when compared to other LED lamps, as the production does not include phosphor...."

('Scuze me if this is a dupe; I did a Google search of the forum first and found nothing.)

 

[Erasmus]

500 lumen from 3.4W equals 147 lumen/W. I want to see that before I believe it.

 

[2xTrinity]

500 lumen from 3.4W equals 147 lumen/W. I want to see that before I believe it.

Wow, finally something that's a more efficient to those pesky energy-hungry 9W CFLs I have around the house. I wonder how long it will take to pay for itself at the price they're asking? (The CFLs were $2)

 

[270winchester]

it may be possibe with a divice that big, if they have 8 small dies far away from each other and have enoug heatsinking while severely underdriven.

BTW where did they say its output is 500 lumens? I have seen some dim 40 watt light bulbs in my life.

 

[PhotonBoy]

A cost analysis:

http://www.raisethehammer.org/blog.asp?id=510

 

[Ken_McE]

Pharox is the first 3.4 watt LED lamp with a light output which can be compared to a standard 40 watt (flame) light bulb.

You will note that they use a rather odd unit to measure its light output. Is a "flame light bulb" one of those incans with a flickery orange filament that is supposed to resemble a candle?

 

[PhotonBoy]

I'm not sure of the 'flame' reference. I read it to mean a 40W standard incandescent bulb.

 

[Ken_McE]

I'm not sure of the 'flame' reference. I read it to mean a 40W standard incandescent bulb.

Yes, that's the impression you were meant to get. You will notice that they don't give an actual output.

 

[3rd_shift]

It still may be interesting to see something like this hit the retail scene.
I would like to try one.

 

[gadget_lover]

Since the page is obviously translated from a different language, it's quite possible that they are not pulling any tricks. Incandescent would be likely to translate to flames.

Daniel

 

[Led_Blind]

By what i have seen online a typical home incan is at about 10lm\w and home ccfl's are at around 50-60lm\w.... Seul leds are beating ccfl's at about 70-80lm\w

So to compare 100watts incan
- thats about 17w of ccfl
- about 12.5w of seul-cree led.

So to be equivelant to 40watts of incan
- 7ish watts of ccfl and
- 5 watts of seul-cree led.

Perhaps if you under drive all the seul-cree leds then you can achieve 100lm\w that means for 40w of incan you need 4w of seul-cree led....100w incan, 10w led

Just wonder if the 40w incan they used was from the 40's and age blackened?? Or is this another leap in led tech.....

 

[PhotonBoy]

I think the recent focus on more efficient lighting is a good move, since any reduction in energy in this area will have a significant effect in reducing atmospheric pollution, solid ash waste, global warming, consumption of fossil fuels (which will disappear eventually) and decreasing demand for additional power plants, both nuclear and conventional.

 

[LEDependent]

I see "flame" as a reference to a flame-shaped candelabra bulb.

 

[2xTrinity]

I see "flame" as a reference to a flame-shaped candelabra bulb.

This seems like a somewhat disingenuous comparison though as the actual product they are selling looks like a standard type-A incandescent replacement shape, not a candelabra bulb. I would like to see a warm white LED replacement for those, especially one that was dimmable. Unfortunately to do the job right IMO the entire fixture would need to be designed to use LEDs from the beginning, rather than using self-ballasted devices.

I'd love to see an LED device for example use a combination of cool and warm white LEDs, then only dim the output of the Cool white one (or dim that output faster) so that the apparent color temp goes down in much the same way as an incandescent lamp.

 

[Duesentrieb]

the technical information of www.lemnislighting.nl writes: "...A 3-Watt Lemnis lamp has the same capacity as these lamps. Typically, it will produce 60 lumen per Watt at low power levels, which will increase linearly." I dont know if this includes the losses of the driver (110V, 220V), it depends on this, if it can compete with with CREE or SEOUL.

 

[Ken_McE]

gadget_lover, good point. I just wrote to [email protected] and asked what the output is in lumens. I'll post if they reply.

 

[Chris M.]

I can help out with this, as this lamp was featured in February`s Lighting (was Lighting Equipment News).

According to the article where one was tested and evaluated:
It uses four red, three green and one blue chip, mounted together on an advanced ceramic heatsink. Produces 75 lumens of 3000K "white" light at a CRI of only Ra24. 4 watts at 19 lumens per watt, and it can`t be dimmed. It costs the equivalent of about US$35 each.

Might not sound very impressive, but Lighting were overall quite pleased with it, and it looks pretty good to me too - though not perfect, it is another step on the LED lighting ladder that should lead on to better things, and might serve some niche purposes such as decorative or low level lighting. Leave one on in the bathroom so you can find your way in and out at night perhaps?

The only other downside was the fact that at the time of release, they were only being offered to customers of one Dutch "green" energy supplier. I don`t know if they have since been offered to the general public, but I would be keen to know. Any Oxxio customers here got any they don`t use? This lamp collector would be very interested in buying one or two.

 

[brickbat]

Produces 75 lumens of 3000K "white" light at a CRI of only Ra24. 4 watts at 19 lumens per watt, and it can`t be dimmed. It costs the equivalent of about US$35 each.

Yikes! If this is true, there's a problem brewing. Buyers are being mislead (misLED?) The fact that Lemnis promotes this product as somehow better is a wee bit misleading. The only 'better' characteristic I see is it's claimed 50k hour life. I've seen the 'white' light from a Lamina ceramics tri-color LED - not good, IMHO.

So what this leads to is people being wary of LED lighting. There's still a lot of folks who don't like CFLs becaues they tried one early on, had a bad experience and remember it.

Chris M, is Lighting Equipment News online? I'd like to read their article...

 

[Ken_McE]

...It uses four red, three green and one blue chip, mounted together on an advanced ceramic heatsink. Produces 75 lumens of 3000K "white" light at a CRI of only Ra24. 4 watts at 19 lumens per watt,

The mix of LEDs shows that they are using the LEDs to their best efficiency and trying for a white mix. Their division between colors approximates the division between different cone types in the human eye. The usual problem with this RGB approach is that you get "fringing" of different colored shadows and highlights around things.

I am familiar with CRI, but what is "RaCRI"?

According to the Wikipedia:

http://en.wikipedia.org/wiki/Incandescent_light_bulb

a 15 watt incan will produce around 100 lumens. A 40 watt incan. should produce around 500 lumens. I realize the Wiki could be off, but I checked their figure for a 100 watt incan. bulb (1,700 lumens) and found it spot on. If the Pharox can get 500 lumens out of 4 watts, then their statement is correct, and the product admirable.

 

[Ken_McE]

It still may be interesting to see something like this hit the retail scene. I would like to try one.

Find a Dutch forum member, ask them to go to:

http://www.oxxio.nl/Oxxio/Thuis/Producten/Lamp/

and see what's involved in getting one. Remember to check if it'll work on your mains voltage.