Tuesday, June 26, 2007

LED bulbs brightness

We all kind of know by now that LED bulbs last long. In fact that is the one thing manufacturers try to keep to. At the expense of other things like brightness. (And still some bulbs don't last.)

So here we go, I investigate this further.
All LEDs are very sensitive to even minor fluctuations in current.
My thinking is that because bulbs are built from many such LED units (with ever so slightly different qualities) they have to be under-driven to keep them last long. And that what most responsible manufacturers do. Problem is, this will affect brightness.

Lifetime is straightforward - you see when your LED dies. Brightness is a little murkier subject. There is candela, lumen etc. Luminous intensity itself is measured in various circles with various depth. Also LEDs are narrow beam "bare lights", so to compare them to compact fluorescent bulbs or to the now trendy long life light bulbs (incandescents) that are housed in a luminaire (or armature) doesn't compare apples with apples.

But let's check out others opinions.

cons (mostly)

Otherpower had a different position. But they recently reviewed it and them seem to be saying that on the whole they are not as bright as claimed.

Not surprisingly, Don Klipstein , the undisputed LED guru seems to be saying the same as he has been doing for some time now. He even calls screw in and other LED bulbs for incandescent replacement a "hype" for the most part.

Rob 'Linear' Arnold has a very thoughtful points about a catch 22 for household LED bulbs in the US: Underwriter laboratories (UL) doesn't see the need to list them, and surveyors doesn't see the need to approve them with UL listing. So there you go.

Pat Mullins is not convinced about the proper heat sinking of screw-in LED replacement bulbs. I tend to share hat opinion, I and haven't change it.

pros

Pual Matthews has a good point on the single color department. This he says in favor of LED "bulbs" since LEDs don't need filtering to create colors. And filters take a lot from brightness. Point taken.

Conclusion?

I still think secondary heat sinks (not just the aluminum plate in the junction) is needed for good brightness performance. And since the best of those is still for external flood light, I am going to assume that the rest is very promising, but in development for now.

Sponsor




41 comments:

kubanez said...

Danke für diese hilfreiche Seite. Machen Sie weiter so.
Thank You for this helpful site. Keep on doing this.
Ihr LEDmeile.de Team / Your LEDmeile.de Team

led resin sign | led resin letters said...

I agree with you, but actually there is one better than led acrylic sign, that is led epoxy resin sign, lighting uniform, save power, waterproof, we produce high grade led sign, high grade led display, high class led letters

find more on led resin sign

Unknown said...

Nice Blog! Well most of your content is informative. Here is another Site which, too, is nice in my opinion Led Light, Lights Led, Led Night Light,Led Home Lighting

NaBa Green Energy said...

I like the presentation, Excellent way to explain. NaBa Green

jc_blueblade0007 said...
This comment has been removed by the author.
jc_blueblade0007 said...

impressive blog! very informative..
check other led products here: http://niceledlights.com

aGreenSupply.com said...

Well, I personally use LED lights in my office and I can see clearly under these lights and have no issues with it. The big plus is that we are saving close too $100 per month just by changing the bulbs and tubes to LED. All I can see that the money we saved in a year can pay off the initial high cost of LED light bulbs and tubes.

Go green and get your LED bulbs today.

Unknown said...

It is very streaming information of LED light features.;I like this LED light and bulb brightness.This LED light bulb is very excellent and high performed bright light lamp.

lights grow

allled said...

thank you for your wonderful post. I agree with you. www.ecoledlight.blogspot.com

ELS LED LAMPS said...

Good work,•The annual energy savings of our 12 watt LED lamp compared to a 75 watt Incandescent. As a direct replacement for a Incandescent lamp, our LED lamp consumes only 78% of the energy used by the Incandescent lamp.
Led Energy Savings

Unknown said...

LED light bulbsLED light bulbs are modern and compact lights that offer excellent energy efficiency. They aims to produce brighter, more energy efficient LED bulbs for everyday use in the home. LED light bulbs are carefully tested to ensure they will offer good value for money and keep working as long as possible.

Drjigg said...

It's an intrusting and you have great collection of Lights.led lights can be used to provide lighting for aquarium fish and plants. But what you should know before going through the LED.Thanks for sharing.....

Unknown said...

Great article. I agree with the author. The site he reccomends is the best. i have added it to my favorites. Thanks for the links.

Unknown said...

Great article. I agree with the author. The site he reccomends is the best. i have added it to my favorites. Thanks for the links.

aelwynedee said...

It is true, even in my car I use LED lights and its more brighter than ordinary.
LED Lighting Strip

HappyLEDLight.com said...

great write up, very helpful information!

Unknown said...

Light Emitting Diodes (LEDs), already used in electrical equipment such as computers and mobile phones. LEDs not only use less power than current energy efficient light-bulbs but they are much smaller and can last years without needing to be replaced.

Led lighting Australia

silocubo said...

nice article about led light , pretty informative

Unknown said...

Nice discussion about LED lights. I like LED Grow Lights also because of their brightness.

Unknown said...

LED lights are long lasting and are known to last 10 times longer than the usual light bulbs at home. Switch to LED Light Bulbs ans save energy and your electricity bills.

Unknown said...

A very informative post with lots of information about the flashlight. Zytechledus is the leading company providing all LED lighting solutions certified by Energy Star across the USA.

Unknown said...

LED lighting technology is impressive-less power consumption and more illumination life.

led bulbs for sale

Unknown said...

Buy LED lighting products from LED Canada. We are suppliers for LED downlights, spotlights and LED Panel.
For more details please Visit:
www.ledcanada.com

Unknown said...

Wonderful post. I have seen your post. The post is helpful. Keep writing about LED light. LED light is a great item which is give us more brightness than traditional light by using lower electric energy than traditional light.

Unknown said...
This comment has been removed by the author.
Unknown said...

I just wanna thank you for sharing your information and your site or blog this is simple but nice article I've ever seen. I like it and learn something new today.Optic-lights - LED Grow Lights

Unknown said...

LED bulbs can give max brightness. LED light is popular for its attractive advantages. Visit www.aceleds.com for find quality assured LED lights.

Unknown said...

very nice information about led lights thank you... Best Led Grow Lights

Unknown said...

LED light can give more brightness than traditional light with fewer voltages. LED light is also mostly using for get max brightness.

Bryan Johnson said...

I agree with you that led light bulbs can give more light than traditional bulb and it also reduce the consumption of electric bill.

Unknown said...

Great post. I hope you can write more good stuff like this article.

uplights boston

Unknown said...

Very nice post on LED Bub,I agree with you.

patrick said...

I pretty agree with this post, but I think they should get the new led hallenbeleuchtung.

Unknown said...

Nice post.
It is really a great help us.
Thank you for share this information
led lighting

Hydro Farming said...

Nice Blog! Well most of your content is informative.
Grow light, Light Emitting diode

Unknown said...

i agreee with what you said


hallenbeleuchtung

Sarah Edward said...

Thanks for sharing your post and it was superb .I would like to hear more from you in future too.

LED

Jhon Marshal said...

I would be grateful if you continue with the quality of what we are doing now with your blog ... I really enjoyed it
50" light bar

Anonymous said...

Congrats, determination and hard working never get bad result.
Star Shower Laser Lights

John Adam said...

I am really very agree with your qualities it is very helpful for look like home. Thanks so much for info and keep it up.
best bike helmet mirror

TimBowers said...

We want to say thnx to you 4 creating this cool weblog and keep going the good work!
LED lights