Lux meter- am I doing it right?
- Thread starter DracoKat
- Start date
- Tagged users None
OP
OP
DracoKat
2500 Club Member
- Joined
- May 12, 2015
- Messages
- 2,787
- Reaction score
- 2,566
- Location
- Lawnguyland, NY
- What state or country do you live in
- New York
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=23758
4 bulb, 48".
I mentioned the bulbs above- ATI bulbs
4 bulb, 48".
I mentioned the bulbs above- ATI bulbs
yea it should be more in the neigborhood of 35000-40000 lux on that and an ati fixture should be slightly more.
that being said. 35000 devide by 45(d riddle) is 777 par, pretty in line with your numbers.
My ati coral plus was 40000 lux at 6- 8 in.
@DracoKat Im not sure whats up with the meter. it all seems high.
Funny, I just triple posed another thread just now too.
My guess (I've owned a par meter for about 8 years and tested over 100 tanks) is you are getting about 6-700 par at the waters surface and 150-200 at the bottom. This would be in the center of the fixture and those numbers would fade quickly on the sides with your fixture that close to the water.
OP
OP
DracoKat
2500 Club Member
- Joined
- May 12, 2015
- Messages
- 2,787
- Reaction score
- 2,566
- Location
- Lawnguyland, NY
- What state or country do you live in
- New York
I thought my internet was wonky.. glad it wasn't me. oops.
@ksc - You know better than I do! I did test on the side, not in the center. I should do center. based on your guess, would be be OK for a clam and/or a nem?
@ksc - You know better than I do! I did test on the side, not in the center. I should do center. based on your guess, would be be OK for a clam and/or a nem?
OP
OP
DracoKat
2500 Club Member
- Joined
- May 12, 2015
- Messages
- 2,787
- Reaction score
- 2,566
- Location
- Lawnguyland, NY
- What state or country do you live in
- New York
@saltyfilmfolks love the straight forward answers, lol. Thank you!
@ksc Its nice to have a par meter guy in the house.
I have a squamosa in about the same amount may a bit more light its middle, but bottom actually. but led w lenses. Was halide. so a bit different falloff but both are close.
I had a squamosa on the sand under my halides. It grew very fast at 250 par, so much so that I moved it into the center under the brace. My BIL has a deresa in his 75gal tank under generic t5's, doesn't grow much but has been looking good for 6 years. He keeps it about half way up.
@ksc Its nice to have a par meter guy in the house.
I have a squamosa in about the same amount may a bit more light its middle, but bottom actually. but led w lenses. Was halide. so a bit different falloff but both are close.
yea once i got the halides dialed in mine grew fine. It got hot I went led, and im still bringing up the intensity slowly.
Still seems happy as a clam
I will say though. working with many folks like you and using Dana riddle's numbers on lux conversion to par. Its dang close. its a bit of a trick w led's but....
still not sure whats up with Dracocats meter.
your doing it right as far as i can tell but the reading has got to be wrong. If you put your hand over the sensor does it read zero?
OP
OP
DracoKat
2500 Club Member
- Joined
- May 12, 2015
- Messages
- 2,787
- Reaction score
- 2,566
- Location
- Lawnguyland, NY
- What state or country do you live in
- New York
@saltyfilmfolks
I did cover the sensor and it read 0. I put the sensor in different locations under the light and the reading was dramaic
on the side, it reads 525/550
between middle and side: 825/950
exact center: 950-ish
I did cover the sensor and it read 0. I put the sensor in different locations under the light and the reading was dramaic
on the side, it reads 525/550
between middle and side: 825/950
exact center: 950-ish
yea if its that close maybe??still sems a bit higg. but i looked and I thought that meter maxed out at readings of 50,000. looking
http://www.abcgeluid.eu/Handleidingen/ABC.LX1010B_Luxmeter.pdf
yea you should not be able to get a reading of 950 x 100
how weird
950x100 is about the brightness of the sun. Maybe take it outside?
