Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 2 / 5   >   >>
mark.lapedus
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
mark.lapedus   1/29/2011 4:07:01 AM
NO RATINGS
I hear the LED lamps from China are terrible in terms of quality. Is that true?

selinz
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
selinz   1/28/2011 9:20:26 PM
NO RATINGS
I recently bought 8 LED flashlights at Walgreens for $5. They are very bright. I left one on for hours inside a piece of equipment and have yet to see any significant drop in brightness. About the only advantage of incandescents is that they can be easily dimmed. Hopefully they will be drop in compatible in those applications too.

jwc
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
jwc   1/28/2011 9:14:08 PM
NO RATINGS
The LED will put out way more light than your 12w incandescent. To save power (almost all of it) chop the 12V (12V dimmer) until the output is comparable to what your had. The dimmer can ran at any frequency you want so there will be no strobe issues.

StuRat
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
StuRat   1/28/2011 8:11:06 PM
NO RATINGS
Had 2 CFLs blow out in a ceiling fan fixture, so I consider that LEDs should have better vibration resistance, in addition to less toxic. Dealing with the Hg vapor is hazardous and not pleasant.

dick_myers
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
dick_myers   1/28/2011 5:41:03 PM
NO RATINGS
You need to buy CFLs/LEDs in the color range you like. These days you can get any color you want, see: http://www.energystar.gov/index.cfm?c=cfls.pr_cfls_color LED lamps are available in color ranges as well. I like the 2700K - 3000K lamps, which look very similar to incandescents.

Duane Benson
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
Duane Benson   1/28/2011 5:30:32 PM
NO RATINGS
I'm very anxious to see some real world results on these LED "bulbs." In theory, CFLs last a long time and produce as much light as an incandescent, but in practice, they only do so under a specific set of conditions. Further, the low-cost volume manufactured CFLs tend to use component on the hairy edge of their rated specs, further distancing practice from potential. If LEDs can avoid the same pitfalls and genuinely last and produce quality light, then I can see a number of changed paradigms in the lighting arena. Most folks talk about the energy savings, and that's certainly the most important aspect of these new lights. But there are potentially other advantages too. There are a number of areas where LEDs have already turned lighting into permanent components of the system. You don't expect to change indicator lighting anymore, for example. If home lighting can truly end up as long-term and reliable as, say a plumbing fixture, then interior designers can have much greater flexibility without unduly burdening homeowners with near-impossible to access bulbs.

prabhakar_deosthali
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
prabhakar_deosthali   1/28/2011 2:39:05 PM
NO RATINGS
The life of LED itself may be 25000 hours but what about the control circuitry built into the bulb. I am sure there will be some control circuitry to convert utility voltage to 12V DC. Will that also last till the lifetime of the LED?

Etmax
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
Etmax   1/28/2011 12:56:09 PM
NO RATINGS
That's a good question. The answer is that it isn't an issue if the supply is designed with that type of source in mind. Because it will probably have been considered a requirement for the lamps to be dimmable, it won't be an issue. If they haven't considered this then who knows.

kaloo
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
kaloo   1/28/2011 10:32:28 AM
NO RATINGS
what will be its behavier on UPS suppply of sqare wave or a petrol generator.

Etmax
User Rank
Author
re: Update: Cree rolls 'breakthrough' LED bulb
Etmax   1/28/2011 5:45:50 AM
NO RATINGS
CFL's are not a replacement for standard incandescents. I have yet to see a CFL that lasts longer than 2 years. On average I need to replace them once per year. When you consider how much more energy goes into making them and that they contain mercury, they are in my opinion an environmental disaster. I have incandescents that have been installed for 11 years without failure. That's even in toilets and hallways where they are frequently cycled. LED's themselves should meet 25,000 hours or even 50,000 if they are kept cool enough, but I wonder about whether the switching converters that run them can meet that considering the price point they will be built to. Also consider the additional EMI of say 20 switchers/lights running in every household at night. Shortwave and AM radio may no longer be what it was :-) .

<<   <   Page 2 / 5   >   >>


Radio
NEXT UPCOMING BROADCAST
In conjunction with unveiling of EE Times’ Silicon 60 list, journalist & Silicon 60 researcher Peter Clarke hosts a conversation on startups in the electronics industry. One of Silicon Valley's great contributions to the world has been the demonstration of how the application of entrepreneurship and venture capital to electronics and semiconductor hardware can create wealth with developments in semiconductors, displays, design automation, MEMS and across the breadth of hardware developments. But in recent years concerns have been raised that traditional venture capital has turned its back on hardware-related startups in favor of software and Internet applications and services. Panelists from incubators join Peter Clarke in debate.
Flash Poll
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.