This article from Electronic Products provides quite a good overview as to why it can’t be assumed that all LEDs are the same quality.
Lumenec has invested considerable time and money in sourcing and testing our LED products. We also give our customers realistic, honest opinions on lifetime, quality, and total cost of ownership issues. We don’t carry junk product, and we aim to provide competitive pricing without compromising quality.
If you’d like to know more about how we approach quality in our LED products, please contact us.