New Lux Meter to check lighting for a mixed reef aquarium

Discussion in 'General Equipment, Hardware, Filtration' started by sdavi66572, Jan 12, 2017.

  1. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    on led?
    divide by 60 AND 55 to get an average. Blue & white ratio is also important. higher blue ratio in general will give you a higher conversion number.
    keep in mind light nutrient and alk levels play a role in deciding PAR ranges. This is why folks say acclimate and "watch the coral"
    So 20,000 is 333 apox. probably a pretty good number. and you can slowly go up from there.
     

  2. drawman

    drawman Valuable Member

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    I can't remember but were you guys tapping about 35,000 Lux at the waterline for the average mixed reef (ie not shallow tank). For LEDs that would convert to about 580 par?
     
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  3. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    yes at a 1;1 ratio. , "blue" in general lowers the par. Base par need on depth rock work etc too.
    important to note @ a conversion of 60, 3000 lux is 50 par. a pretty good increment to increase light IMO.
     
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  4. Esage

    Esage Valuable Member ETRC Member

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    It would be with LED
     
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  5. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    K, then yes, that quote would apply.
     
  6. Syntax1235

    Syntax1235 Active Member

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    So, I just checked my LED's and found quite a variety of readings.... the highest was dead center... 166 on the x100 setting.... is that really only 276 par? My fixture is only at 50%
     
    Last edited: Jan 21, 2017
  7. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    Probably so. high numbers are THE indicator of "dead spots" and the concern of shadowing etc.
    Some change lenses to make it a wider more even spread, some move the light up and away and then increase intensity so compensate for the increased distance.
     
  8. sdavi66572

    sdavi66572 Active Member

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    I picked up some turbo snails on Wednesday. They are cleaning house.
     
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  9. K100286

    K100286 Active Member

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    Maybe a little off topic, but a presentation by Danna Riddle at Macna, showed that high par is not as important as most people think. If my memory is correct par of around 300 will grow most corals. And too much par can slow growth. From past experience I have burned some of my sps with my Kessil ap700's at around 30,000 lux. I am now drown to about 24,000.
     
  10. Bpb

    Bpb Well-Known Member

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    This reading seems high. Taken with phone resting on center brace 12” below the lights. It’s higher than I am seeing most typical readings

    444C5C2A-82D0-4702-9884-03DA7F3678D0.jpeg
     
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  11. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    There’s two settings , one reflective and one ambient( ?i forget the name in the app) One reads the light directly , and the other the amount falling on the meter.
     
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  12. Bpb

    Bpb Well-Known Member

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    Changing it to “reflective” bumped it up to 187k lol
     
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  13. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    Hahaha. What fixture is it ? How many tubes?
     
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  14. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    Going to play with this with estimates.

    81k lux should come in close at 1620 par or so.
    An eat of an eight tube at 12 in in the center should be about 165 par per tube or so , so an eight tube would be about 1350 par.

    How’d we do? Is it a four tube ? Lol.
     
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  15. Bpb

    Bpb Well-Known Member

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    It’s an 8 tube ati sunpower with fans at 7.5 v. 4 blue+, 1 Actinic, 2 purple+, 1 6500k
     
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  16. Bpb

    Bpb Well-Known Member

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    I’ve been worried I’m cooking my corals but I want the best color I can muster. I do have acros at sandbed level. Tank is a standard 90 gallon 48x18x24. 8x54 watt sunpower sitting 12” off the water on top of a canopy with interior painted gloss white. Bulb footprint covers tank footprint flush. But zero light spill due to canopy.
     
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  17. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    cool. Yea I think my estimate up there was prettty close.

    Def should look at $15 meter. It’ll tell you when to change tubes too.

    Sounds like exactly the set you need. A try sps dom tank light.

    Even though the par is high , you controll the dose with the timer now and set your photo period and when the tubes come on.

    You just working with high lighting. Old school.
    (And the maxima on the sand will be very happy lol)
    Your par probably looks like this.


    67145F1C-E891-4596-A848-B8D17733B640.jpeg

    Lest get some t5 pros in if we can.
    @Sabellafella @Diesel @Rakie
    #reefsquad.
     
  18. Susan Edwards

    Susan Edwards Valuable Member R2R Supporter Reef Tank 365 Build Thread Contributor Partner Member 2018

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    what is a good, inexpensive lux meter to purchase?
     
  19. Sabellafella

    Sabellafella Valuable Member R2R Supporter R2R Excellence Award Reef Squad Leader Reef Tank 365 Build Thread Contributor

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    T5s are like a gentle, powerfull light. I have mine about 30 inches from my sandbed as well. May I ask why do you think your cooking your corals?
     
  20. Bpb

    Bpb Well-Known Member

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    I guess mainly because I’m using more light than most people use on a 90 gallon
     
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