maxspect RSX 150

[Fredm]

Hello everyone, I'm posting this message because I'm confused about how to adjust my RSX150 light bar. I watched the BRSTV test video and concluded that setting the blue lights to 75% would give me around 300 PAR at approximately 15 cm underwater, with my light bar positioned 25 cm above the surface. Do you think I'm right? The Photone app and the Danoplus sensor (multiplying by 1.7) give me a much lower result, which I don't really understand. The aquarium measures 90 cm x 45 cm x 40 cm.

Thanks

 

[mcarroll]

FYI Google comes back with car parts when I search for "RSX150 light bar". Are you sure about that?

Regardless it sounds like you might be overthinking it. How many watts is the light? Compare your setup with other lights of the same or similar wattage and see if your setup looks similar – it should.

Most light bars have 120º lenses or similar – tell me if yours are different.

120º lenses usually dictate mounting just above the water surface.

Most lights are geared to the right wattage for the tanks they're intended for (cheapie Chineses fixtures are the most usual exceptions), so in most cases you will want 100% blue and just enough white to make the tank look good to you.

 

[Fredm]

It's a Maxspect RSX 150 :) ! Thanks for your answer !

 

[mcarroll]

It's a Maxspect RSX 150 :) ! Thanks for your answer !

Strangely still not much info on it....found a similar but not the same model on their website: R5-150 under the "RSX Marine" section. Guessing that's it?

If so, then it's a 150w fixture that may have 90º lenses (the old Razor model did IIRC) – I can't confirm that from the info on their site though, can you confirm/deny?

If it has 90º lenses, then the target mounting height is [length of the short side of your tank]÷2. So if the short side is 45cm, mounting height should be around 22-23cm....fine tune it from there (you don't want filter sections, drains or your room being lit, just the display).

With 150 watts spread over the whole tank surface you'll want it at 100% (or close) for the blue channel(s). Again set the white channel(s) just high enough to make everything in the tank look good.

(FWIW, I really liked my Razor while it was running. Still have it, in fact – but I upgraded to a bigger tank/different fixtures.)

 

[PR_nano]

Here are is my schedule. I thought I had measured par but didn’t saw it listed in my thread. My tank is 18” high so around 45cm. I also supplement with 2 AI blade

Maxspect 150w x 1
08:00 - ch1:0, ch2:0, ch3:0, ch4:0
09:30 - ch1:82, ch2:100, ch3:100, ch4:50
16:30 - ch1:82, ch2:100, ch3:100, ch4:50
18:00 - ch1:0, ch2:0, ch3:0, ch4:0

 

[mcarroll]

I also supplement with 2 AI blade

These should be unneeded, depending maybe on your goals. (Or the maxspect is unneeded, depending on your preference! But I ran my old Razor on a tank the exact size as yours and it was "perfect" on an easy SPS tank.)

Assuming you're setting up (eg) a clam tank and want things super bright, I think your setup is probabaly fine, at least on the Maxspect.

IMO at minimum get a downloadable lux meter app and measure levels with and without the maxspect and with and without the AI so you know the relative contribution each one is making. (To account for blue reef lighting vs daylight, you can use a 60 or 70 multiplier to go between lux and PAR. E.g. a 30,000 lux reading is approximately 400-500 PAR, probably closer to the 500 end.

 

[Fredm]

@mccarrol the link : https://www.maxspect.com/fr/innovate-série/636-rsx.html

If I set the blues to 100%, I read over 450 PAR on the Photone app, and almost as much with my Danoplus probe (multiplying the result by 1.7). The first sps are 6-7 cm below the surface and I only have 38 cm of water depth. For your information, the lenses are 120 degrees. I tried running it for 15 days at 92% max and I think I burned a montipora. It's really strange, I've had ramps before, but these one are really causing me problems with the settings....