lukinrats
Premium Member
Ok... I have this question that I am sure will sound stupid, but here it goes... Anyone can answer, but I would love to hear from Grim on this!!!!
I have an 8 bulb Catalina retrofit... I have replaced almost every bulb in it, and also tossed out the individual reflectors that came with it... I probably should have kept them on there with the new bulbs, just for a reference, but it is too late now... Anyway, I replaced the individual reflectors with 4 ice cap SLR's... That means that I have 2 bulbs on each reflector, which I know is considered a NONO... If not a NONO then at least undesirable... I have the fixture about 12" above the surface of the water
Now!! I wanted to know what kind of light I was getting after all this experimentation... I did not want to drop a whole bunch of money on a PAR meter... Instead I looked around on RC and found some Lux values that Halide and T5 users had posted, and decided to compare this first... I just expected my results to be SH*#^^, so I got a Lux, and proceeded to check my lights... Remember that the lights are 12" above the surface of a 30" tall tank w/ 4" sandbed... The numbers I got were equal to what most Halide and T5 users had posted... I was seriously taken a back by this, and I am now wondering what kind of PAR I am getting... I mean if you go by this then my lights are in the 200-300 range for PAR without moving them down any... The LUX measurement that I get with the meter about 6" - 8" under the fixture is in the 35,000 to 45,000 vicinity, meaning 400-600 Par... All the way at the bottom of the tank on the sandbed, I am getting 8,000 LUX, or close to 200 PAR
Just to give an idea... the pictures below are what I am comparing my readings to... This guy is using Halides, and I know the spectrum difference is supposed to cause a slight PAR differences, but this is just preliminary for me
I have an 8 bulb Catalina retrofit... I have replaced almost every bulb in it, and also tossed out the individual reflectors that came with it... I probably should have kept them on there with the new bulbs, just for a reference, but it is too late now... Anyway, I replaced the individual reflectors with 4 ice cap SLR's... That means that I have 2 bulbs on each reflector, which I know is considered a NONO... If not a NONO then at least undesirable... I have the fixture about 12" above the surface of the water
Now!! I wanted to know what kind of light I was getting after all this experimentation... I did not want to drop a whole bunch of money on a PAR meter... Instead I looked around on RC and found some Lux values that Halide and T5 users had posted, and decided to compare this first... I just expected my results to be SH*#^^, so I got a Lux, and proceeded to check my lights... Remember that the lights are 12" above the surface of a 30" tall tank w/ 4" sandbed... The numbers I got were equal to what most Halide and T5 users had posted... I was seriously taken a back by this, and I am now wondering what kind of PAR I am getting... I mean if you go by this then my lights are in the 200-300 range for PAR without moving them down any... The LUX measurement that I get with the meter about 6" - 8" under the fixture is in the 35,000 to 45,000 vicinity, meaning 400-600 Par... All the way at the bottom of the tank on the sandbed, I am getting 8,000 LUX, or close to 200 PAR
Just to give an idea... the pictures below are what I am comparing my readings to... This guy is using Halides, and I know the spectrum difference is supposed to cause a slight PAR differences, but this is just preliminary for me