The green light is the easiest light to adjust because it does not have to be timed, just plug it in and you have a bright, clean light. This means less maintenance and easier cleaning of the bulbs.
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Green LED Light Strip is great for reading and watching TV because it can be adjusted to the perfect level of brightness, but it can also be set to shut off at night and on weekends so that you don't have to fight with it the entire time.
The red light is good for waking up in the morning because the light can be turned down low enough to barely illuminate a room. If you want to read in bed, then the red light is a great option because it can be turned on at the perfect brightness to read, while still keeping your eyes from getting tired.
The white light is good for the bathroom and the kitchen because it is strong enough to let you see inside. It can be turned up to its brightest setting for reading, and then dimmed down for sleep.