Green seems to give off the most usable light to move around, read, etc. The other colors are useful as signalling between your party but don't seem to give off light that is usable.<br><br>I guess it depends on how you think you are going to use the chemical light sticks. They give off omnidirectional light so there is no focused beam of light to really see something. Their light output even at maximum is still pretty dim. They have a 3-5 shelf life and if the foil is punctured, they don't work. You can't test them so see if they are still good.<br><br>They are good for potentially explosive environments since there is no heat or open flame. They are good for small children since they are non-toxic, no heat, no flame. There are a good way for kids to have a light with them and feel more safe. The problem is the kids need to have some good hand strength or be taught how to turn them on via other methods. After about 5-7 years old, they can manage on their own.<br><br>