DE Bulbs: In your opinion, (and experience)

[OCDP]

I had to take out the Geismann 13k or 13.5k (I forget) It was too yellow by itself (no actinic supplements yet) So I put back in my Ushio 20k.

Question is.... I know it's probably an easy answer, but.. are higher K bulbs less intense than lower K bulbs? Now, my 20k is almost a year old.. so I know it would have declined in intensity. But, wow... what difference , the geismann is a good bulb and will be excellent when I get it in the Aqualight Pro, but the 20k is just so much less intense (the length of use could also contribute)

But dang.. my corals look a million times better under 20k. I would way rather use higher K bulbs, and have more colour.. as oppossed to lower K bulbs and increased growth. The colour is stunning! I missed you Ushio