Hi  – when choosing a brand of blue light blocking glasses, here is a criteria list/questions to consider and ask:
1. What percentage of blue light do your orange-tinted lenses block? (they should block 100%)
2. What range of blue light do your orange-tinted lenses block? (they should block blue light between 400-500nm)
3. Do you have a spectral report you can share or independent studies on the effectiveness of your glasses? (if they don’t have a report or don’t want to share it, move on to another brand)
4. Cost/quality? (check reviews) 
5. Comfort? (check reviews)
6. If you wear prescription glasses, ask if they offer prescription orange lenses or do they have models that fit well over prescription glasses?

I personally have and use 2 different brands; a cheap pair of utility goggles by Uvex (cheap, ugly, and not the most comfortable, but effective!), and I recently purchased a pair of Swannies which have independent studies (pricier but nicer looking and more comfortable. I also feel they are just a tad less effective than my Uvex only because they don’t cover the side of the eyes like my Uvex goggles do, but I still love them all around).

Hope this helps you make a more informed choice.