A growing number of people are buying LED luminiares ( Lamps, bulbs) - Great-

but choose wisely . Learn how to discern LED quality from poor offerings.

 

My advice, ask questions to get answers to the key pertinent questions:

Which diode is being used in the product, which model or itteration chip?

Which electrloytic capacitor is used ( if any) is the lamp using AC/LEDS or DC/LEDs ?

Is the lamp  you select right for the application -  there are many performance

variables such as color temp (CCT) there is the consideration on chromatic fidelity,

typically shown as CRI ( this is the wrong metric, the use of CQS is the appropriate one)

Look to Caliper results and consumer reports type assessments, if you know

what your looking for performance wise - examine the LM- 79's ( few do)

 

Is the product from a big 4 concern or a mid or lower tier manufacturer?

This goes to the value of it's warranty - many of which hold little value

to consumers due to their wording, limitations, and legalese .

 

Predicate your determination of value by looking at both

photometric and radiometric measures- ( luminance quality + energy use)

Patronize electrical supply houses and lighting specialist for better quality

than big boxes ( in most instances) Do your due diligence and the product

should last for a decade plus.

 

Also with an eye on the growing trend of coupling SSL with lighting controls,

look for LED luminiares that are advanced & ready for interoperabilty, addressability !

Views: 288

Reply to This

Replies to This Discussion

AC LED's? I've not ever seen them. I've seen 2 LED's in one case called and "A/C LED", but not a true A/C LED. Cost of LED's needs to drop before they gain widespread acceptance, the general public won't pay $20 for one light bulb.

Bob

 My associates in SSL would definitely  disagree- many of us in the biz are selling thousands- and often

tens of thousands worth of products each month. Currently we have 2% of the market -by 2020 we'll

have 90% + of the lighting market( total lamps sold - all form factors included).

It's simply math - it depends on many variables but most savvy business owners get it - and as the

availabilty of great performing LED lighting choices increase the value of LED lighting will increase also.

 

The subset of LED luminiares that use AC/LEDs is also growing - there are many AC LED chip

makers ( it's growing) many of the most highly regarded dice makers have both AC as well as DC chips-

the beauty of the AC /LED equiped luminiares is that they don't require a constant current driver and

they don't use electrolytic capacitors-   I recently tore apart one of those $10.00 ecosmart LED A-19

You may have seen these at home depot- they cost $10 and are eligible for a $8- $10 rebate per bulb.

- the dynamic of post rebate pricing refutes the "the're to expensive arguement"

 

So this mediocre - rebranded LSG product purports to be a

40 watt equivalant lamp- WELL IT no longer works after just 18 months ( less than 10, 000 hours) - the tear

apart revealed the flaw: a nonfunctional electrolytic capacitor ( a typical weak link in such designs).

 

The products with poor engineering and product design are the bane of the SSL community - 

We dread folks getting the "yugo" version of SSL- THE'RE  getting sales , BUT then folks are judging all other LED luminiares by their bad  experience.  Its especially true in LED lighting purchases - ya get what ya pay for !

The likelyhood of getting burned by a poor performing lamp goes way down when you buy products with an

educated eye and discriminating performance expectations.

 

 

 

  

Yes I've seen the $10 ecosmart LED lamps @ HD. They also have a different 40w ecosmart that has a flat shaped "bulb" for $16, same lumen output. I was wondering why such a price difference, now I know why. We don't have the $8-$10 rebates in our area that I've seen. People simply buy the CFL which offers the same lumen per watt as the LED's, but the lamp costs 1/4 the price.

The electrolytic cap has been a problem for CFL lamps also, not just SSL. Oddly they rarely fail for the full size electronic ballasts used in T8/T5 fixtures. I think the problem is the the capacitors have become too physically small to dissipate the heat effectively for the load they experience. A hot capacitor lives a short life which isn't helped by putting the lamp in an enclosed fixture.

What REALLY needs to happen is LED FIXTURES need to be manufactured instead of focusing on retrofit lamps. If the fixture is designed for LED from the start it opens up lots of design options in the process. The difference in fixture price could also be brought down. People may pay $100 for an LED fixture that includes the LED's vs. $80 for a standard fixture than put a $20 LED retrofit bulb in it.

As I am a huge proponent of OLEDs it goes without saying I agree with

what you say   - Oleds offer desigh capabilities that standard form factor & even ropes or ribbon formats lack.    There will definetely be an

increase of all forms of solid state lighting. some traditional - some

enhanced,its got to be seen to be believed. There are outstanding examples

of the coolest stuff at LED trade shows - LED integrated in to all

sorts of different platforms with 1000's of design possibilies -

There are some really cool new developements in SSL

these days..

Even standard form factor LED offers many design possibilities you cant get with CFL or Incandescent. This is what will launch LED's, providing features/benefits that aren't currently available with other technologies. With mass production prices will eventually come down to where price per lumen can be competitive with CFL.

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

tedkidd commented on Scott Mellberg's blog post Lessons from Energy Efficiency Advisors: Getting Homeowners Onboard with Home Performance
"Absolutely agree Ben, "How much do I use, how much do others use, and what is my reasonable…"
25 minutes ago
Profile IconTauran Ivall, Alex Burnham and Annika Brink joined Home Energy Pros
1 hour ago
David Eakin replied to Jamie Kaye's discussion Flickering LED lights
"I also thought that, but I tried to put a CFL in the A-19 outside fixture at my…"
1 hour ago
Ben Jacobs commented on Scott Mellberg's blog post Lessons from Energy Efficiency Advisors: Getting Homeowners Onboard with Home Performance
" I believe a major problem of government, of energy utilities, and home energy efficiency…"
2 hours ago
Jill Lindman posted an event

EEBA Houses That Work Education & Training at Johnson County Administration Building

August 22, 2014 from 8:30am to 4:30pm
About the SessionsIntro to Houses That Work: In this session participants learn how the many…See More
2 hours ago
Glen Gallo replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Title 24 requires whole house fans in zones 8-14 in the prescriptive path only. With many…"
4 hours ago
Jenn Saunders replied to Jenn Saunders's discussion iEnergyApp: Quickly generate professional reports for homeowners and get more contracts!
"Hey Tom, You are most welcome.  iEnergyApp is not free, but it is reasonable and pays for…"
4 hours ago
Jenn Saunders posted a photo

Automatically Generate Clean Simple Reports for Homeowners

Stop spending hours cropping and resizing images, formatting and reformatting a Word document to…
4 hours ago
Eric Sperline added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Beware ebay seller "supermomofps"

I bought a blower door system on Ebay from "supermomofps"  The item was never sent and…See More
4 hours ago
Larry Nissman replied to John Shillito's discussion Fixing a water heater?
"I have to agree with Kurt. 2000 ppm is exceedingly high. I have tested hundreds of hot water heater…"
5 hours ago
Tom White's video was featured

Passive House Revolution - Film Trailer

Looking for energy-efficiency in buildings? There's no need to wait for new technology - Passive House buildings use 80-90% less heating and cooling energy.
5 hours ago
Diane Chojnowski joined Hal Skinner's group
Thumbnail

Radiant Control Coatings

A group where people who work with radiant barrier coatings can let others know all of their uses.See More
5 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service