Anyone tried these?

Hi, has anyone used a omega 600w hps dual spectrum bulb all the way through? I use a hps and flouros at the min and i plan to go 12/12 from seed next grow, to compare with my current grow with a veg time. I'm guessing id be better using the dual spec instead of just a plain hps doing 12/12? Anyone who has used one please chime in.

Thanks all!