2010年7月20日 星期二

How to Buy LED Bulbs | eHow.com

How to Buy LED Bulbs eHow.com

"...Instruction:

Step 1
Determine the wattage needed. For a table lamp, you only need about 3 watts but for lighting a room you need between 7 watts and 10 watts.

Step 2
Determine the beam angle that you need. LED lights do not emit light in all directions like normal lights. The narrower the beam angle the more like a spotlight the LED will appear. A 100 degree beam angle should be wide enough for most rooms and lamps.

Step 3
Decide how many LED bulbs you need. If you plan to upgrade multiple lamps in your house, consider getting a multi-bulb pack to save money.

Step 4
Compare prices from multiple sources. The lights can cost around $100 or more so differences in price can add up. See resources for several online dealers.

Step 5
Chose the LED bulbs that are right for you and order them online or purchase them in person."

2010年5月25日 星期二

An article sharing (qouted from www.ledsmagazine.com) :

Cleantech reports lighting controls energy savings

24 May 2010

Research reveals that lighting control schemes can reduce commercial building energy consumption 35% – 55 %, and technologies such as LED lighting could add to the savings.
Lighting comprises as much as 38% of the electricity expense in a commercial building according to a new Cleantech Approach (CTA) research report, but lighting control technology can greatly reduce that energy usage. The "Lighting Controls: Savings, Solutions, Payback, and Vendor Profiles" report projects 35% - 55% energy savings that delivers a payback on the investment in new lighting in 2.7 to 10.7 years.

CTA recommends that companies first adopt a lighting control system when trying to cut energy usage. The company points out that control systems carry little of the technology risk associated with new lighting technologies such as LED-based solid-state lighting (SSL). Moreover CTA expects a control system installed today to be compatible with new SSL technology in the future.

The projected energy savings in the report are due purely to the ability to dim or extinguish lights automatically when they aren't needed. The adoption of a technology such as SSL could further reduce consumption.

The CTA report calculates the investment payback periods based on a range of costs for a lighting upgrade combined their estimates for the energy savings potential. In the worst case scenario, a project would cost $2.50 per square foot and only save 35% in energy expenses resulting in a 10.7-year payback. In a best case scenario, a project would cost $1.00 per square foot and save 55% in energy expenses resulting in a 2.7-year payback.

The potential flaw in the recommendation that companies install lighting controls separately from SSL is that many of the most advanced control schemes are SSL centric (see related stories at right). Moreover, many legacy lights can't be dimmed or turned off-and-on instantaneously.

2010年4月17日 星期六

20W T8 LED Tube

















Characteristic:

  • High Efficency
  • Long Life Span
  • No flickering, no UV
  • Plastic tubing, safe to touch

Usage:

  • Household indoor lightings
  • Institutional use

Specification:

  • Color: Warm White/Cool White (3000K -- 7000K)
  • Power Input (V): AC100 -- AC240
  • Life Time (hrs): >50,000
  • Power Frequency (hz): 50 -- 60

2010年4月16日 星期五

3x1W High Power LED Spotlight

















Characteristic:

  • High Efficency
  • Long Life Span
  • MR16 base
Usage:
  • Household indoor lightings
  • Mood lightings

Specification:

  • Color:Warm White (4000K)
  • Power Input (V): DC12V
  • Life Time (hrs): 60,000 -- 100,000

2010年4月12日 星期一

6x1W High Power LED bulb


















Characteristic:

  • High Efficency
  • Long Life Span
  • Incandescent Base

Usage:

  • Household indoor lightings

Specification: Color:

  • Warm White (4000K)
  • Power Input (V): AC100 -- AC240
  • Life Time (hrs): 60,000 -- 100,000
  • Power Frequency (hz): 50/60