They also need to be replaced every 6-8 months
The combo of 20K and 6700K, is IMO
, simply trying to get the best of both worlds, growth and color. Right now I run 175W 10K + PC
actinics, was running 12K (and loved the color, but the CoralVue bulbs ignitor took a dive and had to switch back to 10K), when my new balast and bulb get here, I'm retroing my pendant to 250W and upping the spectrum to 20K XM bulb. It's a large increase for the small tank, but I'm hoping to do the same, increase the par slightly (for better growth) and increase color temp for better color.