So going over performance data tonight;
Iwasaki 175w 15K, w/electronic...86 PPFD, Reg. ballast..71 PPFD
Radium 250w 20K, w/electronic...66 PPFD, HQI ballast..85 PPFD
Iwasaki still is best bang for a buck, but guess the problem with them is as someone mentioned before, if you dont happen to like the colour, you're stuck.
Here,s an interesting value,
Sun Aquatics 250w 10K...w/electronic...104 PPFD...with a regular ballast 111 PPFD
I use to run the 14K in this bulb abd thought it lacked in par. Heard the 10K was a good one but never looked it up before.