

It happens to me at night because not only does it have to be quite dark, I audio need to be dork dark adapted. Your pupil is part of your dark adaption and widens in a mater of seconds. However, your receptors also get doped with rhodopsin, which takes up to 20 minutes to full replenish (blue/uv light bleachers rhodopsin). It’s like being able to lower the F-stop on a camera like normal, but taking 20 minutes to raise the ISO



Are they commonly out there with elad and tungsten? Lead is cheap and super heavy so it makes sense for a sales perspective, but I guess I’d naively believe they’d be a toxic tangle companies wouldn’t want to be part of given how stele is good enough. Tungsten, on the other hand, is certainly heavy, but I’d guess the value of the material and the difficulty of machining it would preclude it from a sales sense.