Archive for June, 2011

LED Lamp?

June 10, 2011


Probably by now people are babbling about the LED-lighting technology.
Why? Simply because they…

– Saves energy
– Brighter
– No UV
– Low heat
– Lasts long

OK, last long?
Not for me. I just had bad experience with a set of LED-bulbs I purchase. It’s not the diodes that failed; its the internal power regulator that failed. They screwed up in less than 1 month, despite being used less than 10hrs/daily and in a well ventilated/windy area.

Simply stinks. Why does it ‘burn out’ so fast?
But never mind. Before you make a purchase of your new LED-bulb(s) [specifically for CFL-type replacement], let me share with you some information.

What type of light output? White? Warm white? Blue? You can know this via the temperature colour/rating. Warm white tend to be suitable for spotlights. The light output is yellowish to brown, temperature between 2500K to 3500K. If you are looking for pure white light, head on to those rated between 4500K to 5500K. Anything higher than 5500K will you near pure white light, which tend to be bluish in output.

Now the brightness. Some like it to be illuminated just to ‘light up an area’. Others need it to be just nice. While majority wants to be as bright as it can. This is where lumen rating play a big part. Anything below 150lumen is simply ‘dull lighting’. If its not natural light, a good bulb will have its rating between 350 to 450lumen. If that’s not bright enough, head on to those offering at least 500lumen all the way to 1500lumen.

Now how well will it dissipate the heat. Most light bulbs will have its base made of aluminium alloy or zinc which have been believed to be able to dissipate heat the best. Then, you will see now majority are starting to switch to ABS-type. Some have vent openings, others do not. From my experience, it’s best to get those without the vent openings since dusts loved to creep in, chocking the internal parts, which will slowly relates to faster overheating rate.