New ideas for dimming method for the LED Bulb

[WeiZhao]

Hi, everyone. I've just joined in this forum. 
 
The LED BULB has developed for more than 8 years. As an EE, we also seeking for some new/innovation features such as let the products support 'Wi-Fi' 'Blue Tooth' 'Infrared Control' 'Motion Detect' 'Light Detect' 'NFC' 'Touch Control' 'Temperature Control' 'Vibration Control' …
It seems all the features have been made out…
So, would you help to recommend some new features for the LED BULB? New topology, dimming method?

[Zero999]

I don't want any crappy Internet features in an LED lamp. It would be very good to be able to buy a lamp with a very high relliability and efficiency, like the  Dubai lamp.

If it's going to have dimming, then it musn't be an LED reterofit lamp. Again as above, the lamp should be high reliability and efficiency. Ideally the installation should last for over 10 years, whilst maintaining >90% of the intial brightness. It should be nice and bright, with a full power setting of 5000 lumens, so I can use it for work. The dimmer control should be something fairly cheap and widely available, such as a potentiometer. No wi-fi, touch control, app, or any other rubbish.

Colour temperature control is handy, but I don't see the need to have a separate control for that. The lamp could have high colour temperature such as 5000k when set to 5000 lumens, going down to 3000k, when dimmed to 1000 lumens and 2000k at 250 lumens. That way I can have a high colour temperature, when it's bright and I want to stay awake and a soft, warm light, in the evening, before I go to bed.

I'd rather have a high quality product, with low running costs, rather than most of the consumer crap pushed nowadays.

[Berni]

Im with Zero999 here.

All i want is a reliable high efficiency bulb with minimal electronics. Much like those Phillips Dubai LED lamps that run twice the LEDs at half the max power.

Only problem is that consumers don't tend to buy these lamps because it costs twice as much as a regular cheap crappy bulb. So manufacturers don't have an incentive to make such high quality bulbs.

[Terry Bites]

If it switches on and off and has a good colour temperature I am happy.
Life's too short for all this tech twiddle.
Like hive for people who cant use a thermostat!

[jonpaul]

I want NO NEW "features" to fail.

JUST RELIABLE LIGHT HIGH EFFICIENCY NOT JUNK

j

[Conrad Hoffman]

150W equivalent bulbs are what I like best. 5000K is a requirement and a high CRI is very desirable. Reliable- most bulbs never reach the advertised life. I don't want any other stupid features. I don't want it talking to my phone, the internet or the dog. It has one job, being a light source, and it should do that well.

[emece67]

.

[Miti]

A nice new feature will be the claimed life span to be its actual life span.

Yes, I agree, that would be a nice feature. I just had a Noma bulb failing couple of weeks ago. It was bought during a promotional sale from Canadian Tire, three for $1.99 IIRC. I opened it to satisfy my curiosity and check out what I found. I resoldered all the cracks with lead free solder, very hard because the substrate is aluminum, but it’s back to life. Of course it’s not safe to use anymore, but I wanted to see if there’s anything else wrong with it. Nope, only the cracked solder in multiple locations.

[jonpaul]

We use Sylvana Lighting (Belgium) and Phillips (Netherlands) for fine quality, life and performance.

Costs more, but you get what you pay for.

The   knockoffs have only one priority: Cheapest possible design and parts, get your money and they care less.

DONT BUY JUNK
j

[Gyro]

We use Sylvana Lighting (Belgium) and Phillips (Netherlands) for fine quality, life and performance.

Costs more, but you get what you pay for.

The Chinese knockoffs have only one priority: Cheapest possible designand parts, get your money and they care less.

DONT BUY CHINESE

j

As witnessed first hand, and by other people, Philips lamps (made by Signify) is developing a very poor reliability reputation.

At the same time LEDVANCE, owners of the Sylvania and Osram brand names, seem to he holding up well, at least at the moment. LEDVANCE, whilst currently using German engineers, is owned by a Chinese consortium.

https://www.eevblog.com/forum/chat/electronics-products-where-are-they-madedesigned/msg3613396/#msg3613396


EDIT: From the Sylvania website...

Formed in January 2016, Feilo Sylvania is 80% owned by Shanghai Feilo Acoustics Co., Ltd, which is principally engaged in the manufacture and distribution of lighting equipment. Headquartered in Shanghai,

Shanghai Feilo Acoustics Co Ltd was founded in 1984 and is China’s first joint-stock company (SH 600651). The company reorganised its M&A on a large scale in 2014 and became a joint enterprise comprising
companies including Shanghai Yaming Lighting Co Ltd, Beijing Shen’an Group as well as Shanghai Sunlight Enterprise Co Ltd. With the acquisition of Havells Sylvania, Feilo has gained manufacturing bases, logistics centres, R&D technology centres around the world, as well as market access in 48 countries.

Not quite sure how that ties in with LEDVANCE's use of the Sylvania brand name, but either way, they're Chinese owned.

[jonpaul]

Sylvana is indeed owned by Chinese but has production based also in Germany and other countries.

 Sylvania Lighting R&D is in Belgium and refined to a very high level.



Jon

[TimNJ]

  A bit wild to be flagrantly shitting on Chinese engineering/manufacturing, especially when the original poster is Chinese, don't you think? Not a very warm welcome to the forum.

Wei Zhao, welcome to the forum.   

[TimFox]

Changing the color temperature is rarely needed, but depending on the application there are two normal choices:
A.  Roughly 5000 K--this is considered to be sunlight color.  Probably better for a working environment.
B.  Roughly 2600 to 3200 K--this is considered to be "tungsten" color, i.e. the color of an incandescent lamp.  This is often called "warm", even if the actual color (black-body equivalent) temperature (redder) is less than the "cool" (bluer) color temperature of the sunlight.

[Gyro]

Changing the color temperature is rarely needed, but depending on the application there are two normal choices:
A.  Roughly 5000 K--this is considered to be sunlight color.  Probably better for a working environment.

Nah, too blue, you'll keep the staff awake.    [Edit: Actually most commercial fluorescent tubes probably are in the 5000k range]

B.  Roughly 2600 to 3200 K--this is considered to be "tungsten" color, i.e. the color of an incandescent lamp.  This is often called "warm", even if the actual color (black-body equivalent) temperature (redder) is less than the "cool" (bluer) color temperature of the sunlight.

I think the world will probably get used to something like 4000k as a good comfortable compromise in this post Tungsten age. It must be a bit like how it was in the transition from the old candles, oil lamps and gas mantles  to the great new era of electric lighting (although carbon filaments were pretty yellow).

[TimFox]

Where this question becomes important is judging colors--matching ones tie to ones socks.  However, it has been shown that matching (as opposed to judging) colors works well over a range of color temperatures, so long as the spectra are continuous.  Of course, color balance is important to color photography (both film and digital).  I made a beautiful large-format detail shot of a steam locomotive in an indoor museum, shot on EPY (3200 K balanced Ektachrome--we shall not see its like again), using tungsten photo lighting, where there are a few specular reflections from a skylight that are rendered blue in the image (which I tell people I did on purpose).

[BrokenYugo]

Seems to me most of the problems are thermal, which come from safely and cheaply cramming 800+ lumens of LED and driver into the A19 shaped package. Can't really do better without spending more (e.g. isolated driver design and exposed metal heatsink) or abandoning a 130 year old standard.

[jonpaul]

Colorimitery is a big topic.

Lighting industry has evolved,

2700-3400 K LEDs are common for "tungsten" color warm white.

For Daylight   Sun is 5600K, many LEDs are at 4000-5000K

Jon

[NiHaoMike]

If the dimming and remote control is done over Wifi, make it usable without the cloud and document the protocol.

[WeiZhao]

I don't want any crappy Internet features in an LED lamp. It would be very good to be able to buy a lamp with a very high relliability and efficiency, like the  Dubai lamp.

If it's going to have dimming, then it musn't be an LED reterofit lamp. Again as above, the lamp should be high reliability and efficiency. Ideally the installation should last for over 10 years, whilst maintaining >90% of the intial brightness. It should be nice and bright, with a full power setting of 5000 lumens, so I can use it for work. The dimmer control should be something fairly cheap and widely available, such as a potentiometer. No wi-fi, touch control, app, or any other rubbish.

Hi, Buddy.

This is my 1st post in this forum. I never thought will get so many replies. Really appreciated.

Back to the topic, I fully agree with your opinion
"Long Life Time"
"High Efficiency"
"Color Temperature"
"Low Running Cost"

Thanks for your professional suggestions, man. 
I'll talk with our product manager, let's keep these features as the critical to quality. Others are really nice to have.
 

[WeiZhao]

Im with Zero999 here.

All i want is a reliable high efficiency bulb with minimal electronics. Much like those Phillips Dubai LED lamps that run twice the LEDs at half the max power.

Only problem is that consumers don't tend to buy these lamps because it costs twice as much as a regular cheap crappy bulb. So manufacturers don't have an incentive to make such high quality bulbs.

Hi, Berni.

Thanks for your reply.

Well, actually, I'm working for Philips Lighting. Really appreciated you like Dubai Lamp. 

We'll keep on digging the margin to improve the Lamp's efficiency.

 

[WeiZhao]

If it switches on and off and has a good colour temperature I am happy.
Life's too short for all this tech twiddle.
Like hive for people who cant use a thermostat!

Copy, Terry.

Switching on/off to change the Color Temperature.

This is quite a useful feature, and I thought we've already have some products.

Thanks. 

[WeiZhao]

I want NO NEW "features" to fail.

JUST RELIABLE LIGHT HIGH EFFICIENCY NOT JUNK

j

Copy that.
merci~~

[WeiZhao]

150W equivalent bulbs are what I like best. 5000K is a requirement and a high CRI is very desirable. Reliable- most bulbs never reach the advertised life. I don't want any other stupid features. I don't want it talking to my phone, the internet or the dog. It has one job, being a light source, and it should do that well.

Hi, Conrad.

Higher Lux, Higher CRI, qualified lifetime, copy.

BTW, say hello for me to your dog.

[WeiZhao]

A nice new feature will be the claimed life span to be its actual life span.

Yes, I agree, that would be a nice feature. I just had a Noma bulb failing couple of weeks ago. It was bought during a promotional sale from Canadian Tire, three for $1.99 IIRC. I opened it to satisfy my curiosity and check out what I found. I resoldered all the cracks with lead free solder, very hard because the substrate is aluminum, but it’s back to life. Of course it’s not safe to use anymore, but I wanted to see if there’s anything else wrong with it. Nope, only the cracked solder in multiple locations.

Hi, Miti.

You're quite professional!

RELIABILITY, always is key to customers. 

[WeiZhao]

We use Sylvana Lighting (Belgium) and Phillips (Netherlands) for fine quality, life and performance.

Costs more, but you get what you pay for.

The   knockoffs have only one priority: Cheapest possible design and parts, get your money and they care less.

DONT BUY JUNK
j

Hi, Jonpal:

Thanks for choose Philips Products.
Trust me, we have the best quality in LED LAMPs' marketing.
For we are doing the most complex and comprehensive tests for the products.