This is one of the newest Deep Red LEDs on the market from one of the largest LED manufacturers! It has been proven to be very reliable and more efficient that many other higher end LEDs, including Luxeon.
The new Seoul Z5 LEDs have proven to be superior to the SemiLeds in every way. As always, we will offer it at the lowest price because we purchases in very large volumes, and we reflow the LEDs in-house at our manufacturing facility here in the USA! We simply pass the savings on to you.