Dr. Gary Heiting has an article called, 'Blue Light - Is It Bad For Your Eyes?" that you should read.
This is a great article about blue light, UV, and the perils and benefits of both. A must-read if you are concerned about blue light exposure and what to do about it.
Read the article in full- Blue Light-Bad For Your Eyes?
Dr Gary Heiting, O.D., is the Senior Editor at AllAboutVision.com
For most people, lenses that filter or reflect off 20% of blue light/HEV is appropriate. Some folks are more glare sensitive and need more heavily tinted or saturated blue block lenses. Talk with your eye doctor about your particular issues.