Well, I found out the hard way that the lens is just pressed into the housing. I don't know how hard the lens is to extract (I think I must have had my tanks roll on to the light, and when I found the light, the lens was askew, and an o-ring was visible). Taking out the lens along with a few more o-rings got me down to the driver. I don't know if there is a better way to get at, but this is one way. -Todd.