LEDs

Haitz's Law

As manufacturers strive for market share in the burgeoning LED lighting market each tries to outdo the other with ever-improving efficacy claims. But just how far can the LED chip makers go and how soon will they get there? Equally important: LED cost is plummeting. Thanks to a phenomenon known as Haitz’s Law, LED cost

Fundamentals: LED color chart

Fundamentals: LED color chart article gives a brief review on color temperature and how it affects white LED light. Despite the fact that LEDs produce light by a process other than heating, we still use correlated color temperature (CCT) when describing the appearance of the LED as it relates to the appearance of a black

Replacing fluorescent lamp with LED

The idea if replacing fluorescent light bulbs with LEDs seems to become popular. There are different kind of products made for that purpose, some are good and some not so good. So I felt it was now good time to test this technology. LED technology promises to reduce power consumption about 50% of fluorescent bulbs

Bumps in the road ahead for solid-state lighting

LED retrofit lamps have started to show up on retail shelves. Many players in the LED industry are giddy about the anticipated growth over the next few years. Nevertheless, the road to success for LED lighting will not be completely smooth, as there are a number of pitfalls to navigate. Bumps in the road ahead

Replacing flashlight bulbs with LEDs

One day I had an old flashlight that had burned light bulb on it. It was a small cheap model powered with two AA batteries. I could fix it with new light bulb, but going through the trouble of trying to find exactly suitable replacement light bulb felt like more than the value of the

Philips winning LED-based 60W replacement bulb

Philips wins $10M L Prize for LED-based 60W replacement bulb article tells that Philips wins $10M L Prize for LED-based 60W replacement bulb. The bulbs had to meet or exceed a set of requirements: greater than 900lm at 10W or less (efficacy of greater than 90W/lm) at a color-corrected temperature (CCT) of 2700-3000K and a

Electrolytic capacitor life

As we all know, a good LED could last very long up to 50,000 hours with with a good heat sink. But how is the LED driver electronics life? For common LED drivers there is at least one component is very weak. It’s the electrolytic capacitor. High Bay LED Lighting Driver Heat Dissipation Temperature Test

LED usage increases quickly

Lighting apps boost LED usage article says that in in 2011, DisplaySearch predicts global LED capacity will reach 180 billion units, and by 2013 will reach 227 billion. The total average LED penetration in lighting was 1.4% in 2010 and is forecast to reach 9.3% in 2014.

LEDs and dimmers

Using existing triac controllers and wiring offers a number of challenges for LED lighting. To maximize the success and adoption of solid-state lighting for retrofit lamps, the LED lamps should be capable of dimming when used with existing controllers and wiring. Lighting designs with flicker-free LED dimming article explores the typical TRIAC dimmer, some of