Plants grow best under 6500k lighting. If you can find some 6500k lights then I would go for it. There is no difference from them and the ones the pet store sells. Just make sure they say natural daylight. If you want a more blue is but still white look you could do two 6500 k
lights in the middle and 2 10000k lights in the outside slots. This will give you a very bright but clear/ tint look to your tank.