After a good nights rest about 10 minutes after lights on.
I dont I'm just a lucky idiot. I've been using vertical bulbs for a long time never used any glasses and by some miracle at 40 still have 20/20 vision. Its actually little better than that but for all intense purposes visions still as good as it was at 20.I hope you have a good pair of dark sunglasses. Ive damage my eyes from over exposure to HPS glare