I recently bought a wet tested par meter from BRS. Just unboxed it and gave it a try. I run 4 hydra 26s over my 210 gallon tank with the ab+ full power schedule. My lights are 13 inches off the water. Water level reading was 250 par 30inches below on the sand bed I got a reading of 80-100. How is this possible with my lights basically turned up all the way. Is there something wrong with the sensor? Does anybody have experience with using a par meter? Am I doing something wrong?