Which one Led chips will you use?

As far as we have learnt, there are many famous LED chips brands as following:

The foreign brands: Nichia, Cree, HP, Toyoda GeseiCo, Toshiba, SDK, Philips Lumileds, luxeon, Smileds, Genelite, Osram, Gelcore, Bridgelux, Seoul, Epivalley and etc.

The china mainland brands: Silan, AXT, LM, San’An, Epilight and etc.

The china taiwan brands: Epistar, Huga, Genesis Photonics, Arima Optoelectronics, AOC and etc.

Osram, Cree and Epistar LED chips are widely used in LED displays. Most of LED display companies will buy chips or lamps from them. It is forecasted that China will produce more than 70% LED products for the world LED market, China will become the largest LED chip market at the time in the world. although Osram is of top quality and famous, but the extremely high price scare most customers at present. Cree is of good quality and moderate price, so most high grade customers will choose Cree. The most common-used brands of LED diode are Epistar made in TaiWan and the quality of these LED chips are judged mainly by 5 criteria, which is brightness, attenuation, color uniformity, viewing angle and stability.

Without doubt,China has the strong technology strength and ability to make good quality LED chips now. Also Chips made in China own very big market share in the world LED products market with good reputation due to high cost performance.

Based on the following test results, we found that Cree is the only brand which stabilizes after the first 10000 hours and the attenuation after the first 10000 hours is very minimal.

The brightness (measured by mcd)

Red lamp400-600 mcd400-600 mcd330-600 mcd
Green lamp1600-2400 mcd1100-1600 mcd1200-1700 mcd
Blue lamp300-700 mcd300-600 mcd300-650 mcd
Whole pixel2700-4300 mcd2200-3400 mcd2450-3450 mcd

The brightness attenuation after 10000 hours:

Red lamp2.5%26%28%
Green lamp2.5%26%28%
Blue lamp2.5%26%28%

Viewing angle:

Horizontal150 degrees120 degrees110 degrees
Vertical60 degrees70 degrees80 degrees

These three brands are common-use in the market, many LED lights contain these kinds of LED chips and different chips of them depend on different product price and quality.