I wish I could find somewhere that made real FL-41 clip-ons. I loved my Theraspecs sunglasses when I wore contact lenses, but in regular glasses, I can't get that same benefit. I'm not willing to buy two pair so I can have one with and one without, because they want you to send your glasses to them for coating.

EDIT: To OP, yes, they do really well at reducing blue light, which is one of the more common triggers for photophobia-related issues like migraines.

EDIT 2: If anyone has tried the lenses from Somnilight, I'd love to hear unbiased feedback. They apparently do sell clip-ons, unlike Theraspecs, for way less money, too.