Preliminary PAR Results

[DenverDave]

Dave, thanks for the PAR meter.

For anyone interested, I have a Current USA Sundial fixture with a Radium 150W DE bulb and 2X32 PC actinics. With the bulb 6 inches above the water, here are some of the readings:

Just under the water directly under the bulb: 1200

6 inches under the the water directly under the bulb (my Oregon Torte is here): 800

At the bottom (16-17 inches under): approx 125-150

Also, with the bulb mounted side to side, the PAR drops off much more quickly front to back than side to side. For example, my Cali Torte is only 4 inches from the left side of the tank but is centered front to back- at the same depth as my other torte, PAR was still 600.
However, something centered side to side but slightly farther back or front is likely to have 400-500 PAR.

I'm going to test the Phoenix 14K later.

Dave

 

[68RUSTANG]

Is the Radium 20K?

 

[spleify]

<a href=showthread.php?s=&postid=15109681#post15109681 target=_blank>Originally posted</a> by 68RUSTANG
Is the Radium 20K?

Yes

 

[DenverDave]

Yup, but it actually looks less blue than the Phoenix 14k. DarG and others in the lighting forum said that it is actually a 20K + bulb.

How they assign numbers that are supposed to be a quantitative measure but end up being somewhat relative is beyond me...