After getting through a couple of speedglas masks, I thought I'd have a change and go for an esab. The speedglas masks were battery powered and switched off when not used but this stays on. The speedglas spent it's life hung on a hook facing the light over the bench. I was wondering, if I hang this mask on the same hook, it will be constantly darkened (when the light is on). Would this have any long term effect on the mask?