I use Nokya Arctic White Stage 2 80W.
After 1.5 years, they are still alive.
Comparing with the price, I think this bulb is worth the price. (Around $20 on ebay)
But there are 2 different kinds of the bulbs on ebay,
They are both Nokya Arctic White Stage 2, but different watt.
You need to pay attention to this.
This one is 80W.
This one is 100W.
The photo of 100W is the same as it shown on NOKYA website. (The photo of 80w is not.)
Maybe the 80W is the old version?
I have no idea.
By the way, I do use a high-watt harness.
But I don't know it's necessary or not.