My Geisemanns came today and I can honestly say theres a very nice difference in the coloration and contrasts of my stuff. Ill try a couple different combos of the spectrums but the Pure Actinics really do make my Teal brain, Hammer and Frogspawn pop. The AquaBlues and even the Midday I put in there just seem to emit a sharper and bolder light. What it means for growth i can only hope is as dramatic as the visible light. Worth the extra 2x the cost of other company's? Not sure yet, I'll have to see the growth. If these things gotta be replaced every 6 months then no, i wouldnt pay $200 for 6 48" and 4 24". Id probably get one pure actinic for both tanks and save money on the rest.