Radion owners speak up..

[amuvor]

Originally Posted by jorjef

Okay lets hear from the people that own them. There has to be a bunch of you out there!! What do you have to say, good, bad? meets expectations or left a little dissappointed. No arm chair experts, if you didn't shell out the cash hold your comments please. Will be interesting to see how quiet this thread may or may not be.

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I purchased two Radion fixtures from Concept Aquatics. Thank you Dave and Brad.

I have hanged them from the ceiling temporarily, with rope.

My tank is 4feet long, but it’s 38” wide, and shallow: 22”. The water column, however, sand excluded, is only 18”.

Initially, I experimented hanging the Radions 6 inches away from the water surface, but I got an unlit portion in the middle of the tank, and marked shadows.

At 12” from the water (see pics) the shadows disappear and the tank appears more homogeneously lit.

I used the spectral plots reported in Advanced Aquarist by Sanjai Joshi for Iwasaki and Radium 250W bulbs to guide me in programming spectral peaks and lows for the Radion. I followed Riddle’s work to manage the red part of the spectrum.

The measurements below were taken at noon, when I programmed the fixture to display the highest relative intensity.

Average PAR measurements (Apogee) on the mid to upper reef (12 measurements) is 305; range: 170-455.

Note on expectations:

The tank appears dimmer than it did under MH / Compact combo, even though PAR measurements are on par.

The reds, pinks, and blues appear washed; mute, a little bland.

Glitter lines do compare to MH’s.

Software does not include natural mode; only artificial. I experienced problems with launching speed. Overall, the interface feels underdeveloped, not as user friendly as it could be.