I was worried that the PIAA genuine replacement valve was discontinued, but I found a similar product with Hatasu, ordered by haste. I was surprised to arrive at hand at the next day after ordering. 4000k is also a satisfying light color. I do not know unless you try using only durability, but it is also made by Stanley, I trust it. I heard that halogen bulbs are easy to break, but they did not last for half a year and were surprised without replacement parts. Will you buy a spare?