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: 285

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

Robert Leone added a discussion to the group Energy Auditing Equipment for Sale, Trade or to Purchase
Thumbnail

Blower Door Package for Sale

Hi,I am selling my blower door with extras as a package or individually. These items are used but…See More
3 hours ago
Profile IconRobert Leone and Richard Vito joined allen p tanner's group
Thumbnail

Energy Auditing Equipment for Sale, Trade or to Purchase

Discuss the pros and cons of the equipment you are interested in prior to purchase. Post equipment…See More
3 hours ago
Richard Vito joined Sean Lintow Sr's group
Thumbnail

Best Practices (Residential)

Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what…See More
11 hours ago
Richard Vito joined James Sayers's group
Thumbnail

Marketing Energy Efficiency

Sharing ideas, tools and examples of promoting energy efficiency to consumersSee More
11 hours ago
Richard Vito joined Allison A. Bailes III's group
Thumbnail

HVAC

HVAC design, Manuals J, S, T, & D, Duct leakage, Air flow, ENERGY STAR new home requirements,…See More
11 hours ago
Richard Vito joined Kyle Brown's group
Thumbnail

Wrightsoft - Manual J / Manual D

If you use Wrightsoft to calculate loads or design ducts, you likely have questions.  Get answers…See More
11 hours ago
Jim Gunshinan commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"I had a revelation while attending Bruce Manclark's session of duct leak testing at the Energy…"
yesterday
George J. Nesbitt commented on Jim Gunshinan's blog post Energy Upgrade California—Up Close and Personal
"Blower Door; the 2007 test was a depressurization test, and the 2014 a pressurization test, which…"
yesterday
George J. Nesbitt replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Plan, plan, plan, plan. The 1st step to is to understand the house, how it's built, the…"
yesterday
George J. Nesbitt posted an event

High Performance Windows - A Panel of Experts at Pyramid Alehouse`

April 26, 2014 from 3pm to 5pm
Join a lively panel discussion on high performance windows. We'll cover some basics, as well as…See More
yesterday
Kaushal Bharath Raju replied to Kaushal Bharath Raju's discussion Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
"Hi David, Thanks for pointing out Martin Holiday's article. I do not wish to engage in the…"
yesterday
Profile IconAdam Penberthy, Scot Davidson and j jarvella joined Home Energy Pros
yesterday

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service