[Doug]

Hi Des;
I sold them, so I am speaking from the couple days I was running them.

First, I assume you ordered the 400,s plus 20K Radium bulbs. If so, you will love it. Man, its nice. As much as I like my 700 watts of vho, I just sit and stare at my friends 120, where my lights are.

No actinic supplements are needed. The tank colour is just a perfect bright blue/white. So you save on bulbs there, which help pay for the 20K,s.

In my friends tank, we put a pair of 40 watt Philips actinic bulbs, in his hood. Driven by one of those $50 electronic ballasts/with endcaps.

He uses it for evening viewing, after the halides are off. Run them until they calf, as they are only for you. His dont even come on, until just before the halides go off.

First, they are not needed in the morning, as
1. The halides are a softer start to light up, than actinics coming on full impact.
2. No sense running the extra wattage during the halide period, as you cant see them anyways.

Good luck with your new system. Let us know how you like it, or if you have anymore questions.