difference between plant & aquarium & sun light

[ladyslipper]

Hi guys, I am just back from home depot checking out what i might need for the grow station I need. There were two lights that I am not sure what the difference is. What is the difference (possibly other than the colour of the light emitted) between plant and aquarium lights and sunlight tubes? I thought maybe amongst other things the sunlight might emit light that looks more familiar to us as opposed to the slightly violet coloured lights sometimes seen in aquariums. both of the 24 inch tubes were something like $7.50 (CDN) each.

regards, m