Kessil Penetration
- Thread starter Devi
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TheEngineer
Formerly icecool2
I must have misremembered the number. 79k 6" under. Same with a sheet of paper over it.
thank you.
perfect. Its a good test for the accuracy of the meter. @100,000 plus and other oddly high numbers sometimes its the sensor reading the bulb,globe,tube.
and sorry 7.9k or 79,000 lux? 79k is a heck of a lot. cool though.
my MH+led 20in deep sps is 34,000 l the dt is 24in t5 @ 23,000k with high blue so a higher par.
I dont care whats on the bottom, but if i did I'd just shine the light on the meter @ 20in
(I actually already did that before I hung it. so I knew it would work)
I agreeI think this app is a horrible indicator. The values bounce around. Here's another test at the water surface with a piece of paper over the camera.
yea, I always advise move the app over the surface of the tank and get an average.(or the paper trick)
But before that I advise get the $15 meter.
Really the best use of the meter is acclimation.(match intensity, drop it 30% slowly bring it up like tracking alk consumption or vodka dosing) OR the curious question do I have enough light.
Or when buying a light you can test it dry. (knowing its spectrum and likely par)
OR you can shine you tank light on the wall or floor @ the distance you want to hang it at and see if there is any fall off(decrease in intensity)
It is a phone.
or for Iphone its a computer with a camera you can call people with
so imagine how bad the other apps were LOL
got anything white? or grey?
(cameras are calibrated at 18% grey)
at a certain point these are all just mind candy really.
gotta run. My vanilla orchid just got a new pod. We keep it in a spot where it gets no more than 1000 footcandles during the day and suppliment with a 5600 kelvin led. @400 fc.
TheEngineer
Formerly icecool2
I actually ordered one and something at Amazon got screwed up and it never came. I might try ordering it again.I agree
yea, I always advise move the app over the surface of the tank and get an average.(or the paper trick)
But before that I advise get the $15 meter.
Really the best use of the meter is acclimation.(match intensity, drop it 30% slowly bring it up like tracking alk consumption or vodka dosing) OR the curious question do I have enough light.
Or when buying a light you can test it dry. (knowing its spectrum and likely par)
OR you can shine you tank light on the wall or floor @ the distance you want to hang it at and see if there is any fall off(decrease in intensity)
It is a phone.
or for Iphone its a computer with a camera you can call people with
so imagine how bad the other apps were LOL
got anything white? or grey?
(cameras are calibrated at 18% grey)
at a certain point these are all just mind candy really.
gotta run. My vanilla orchid just got a new pod. We keep it in a spot where it gets no more than 1000 footcandles during the day and suppliment with a 5600 kelvin led. @400 fc.
dang.. if you like these kinds of puzzles its pretty fun and the meter will last a long time and you can lend it out. Yea its like a api test, but... the par meter is confusing too.
The neat bit is when, like I did, upgrade the lighting to the same intensity and actually see the corals respond to the new color(more available par). light spectrum and coral photosynthesis is really an amazing thing.
while your ordering get the $5 spectrometer. More science!
wear sunglasses. no really..If its too bright to look at dont.
thats a trip, witch one did you get? do you still have the link?
TheEngineer
Formerly icecool2
EISCO Premium Quantitative Spectroscope, +/- 5nm Accuracy https://www.amazon.com/dp/B00B84DGDA/ref=cm_sw_r_cp_awd_OxMWwbDY31R4F
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yea I have that one. weird. try the sunglasses. I have a glass ND filter for bright lights. Nutral density
mcarroll
10K Club member
I have this one...
http://shop.sciencefirst.com/diffraction-interference/2761-spectrometer-project-star.html
I don't know if it's very similar or not, but I will say there is definitely a touch to using it well. Not unlike using a gun or telescope sight in case you have tried that.
http://shop.sciencefirst.com/diffraction-interference/2761-spectrometer-project-star.html
I don't know if it's very similar or not, but I will say there is definitely a touch to using it well. Not unlike using a gun or telescope sight in case you have tried that.
mcarroll
10K Club member
I think this app is a horrible indicator. The values bounce around. Here's another test at the water surface with a piece of paper over the camera.
Glad you got the numbers straightened out!
Just try to train it in so you can get a maximum reading at each location you measure - don't worry too much about the jumping around.
It's a good place to start but there's a good reason I recommend the handheld meter every time I recommend the app.
I think you will find the lux meter and spectrometer very interesting to have around!
