Someone once told me that you can get almost the same results as those fancy aquarium bulbs, by if you choosing the right colour standard bulb from mitre10 for a fraction of the price? Exactly what makes these gro bulbs different? Yes I know they will be "specially designed" for growing aquatic plants, but what is different in the way they do that to any other normal bulb like say a 6800k T8 that most would use?