pedalinbob
Flashlight Enthusiast
just got it today, and it is quite exciting to be able to do my own measurements.
it is a cheapie meter, but my intention is more for comparison, than overall accuracy.
it has a dial which goes through the ranges: off--200--2000--20000--50000. it can read both lux and foot-candles.
i placed the meter in a very dark area (basement), the sensor mounted on the wall. then i set up a vice to hold the lights. i took the measurements with the lens of the lights at 1 meter from the sensor. i allowed the flashlight to run for ~5 minutes before taking a reading, as i noticed the reading would drift down a bit (is there a surface charge on the battery which is relieved in the first few minutes?), and then stabilize. i placed the center of the beam on the sensor.
the sensor was set on "200 lux", except for 2 of my samples, which required changing to "2000 lux".
my results are a bit surprising, and perhaps inaccurate:
CMG infinity ultra-------21 lux.
PT impact II------------110
PT Attitude--------------51
PT Aurora----------------32
Franken-beam------------478
PT-40-------------------745
the Ultra was on lithium. the rest on alkies.
the aurora has roughly 12 hours of use--on low beam for reading at night.
"Franken-beam" is my first mod: twin LS/O 1w mounted in a 3-d $ag lite, direct drive with 3-d cells! there is over 2 hours on the batteries (i ran it for 2 hours straight to test the heatsink). i need to post some beamshots of this thing--it is so much fun!
the rest have less than 1 hour on them.
later,
Bob
it is a cheapie meter, but my intention is more for comparison, than overall accuracy.
it has a dial which goes through the ranges: off--200--2000--20000--50000. it can read both lux and foot-candles.
i placed the meter in a very dark area (basement), the sensor mounted on the wall. then i set up a vice to hold the lights. i took the measurements with the lens of the lights at 1 meter from the sensor. i allowed the flashlight to run for ~5 minutes before taking a reading, as i noticed the reading would drift down a bit (is there a surface charge on the battery which is relieved in the first few minutes?), and then stabilize. i placed the center of the beam on the sensor.
the sensor was set on "200 lux", except for 2 of my samples, which required changing to "2000 lux".
my results are a bit surprising, and perhaps inaccurate:
CMG infinity ultra-------21 lux.
PT impact II------------110
PT Attitude--------------51
PT Aurora----------------32
Franken-beam------------478
PT-40-------------------745
the Ultra was on lithium. the rest on alkies.
the aurora has roughly 12 hours of use--on low beam for reading at night.
"Franken-beam" is my first mod: twin LS/O 1w mounted in a 3-d $ag lite, direct drive with 3-d cells! there is over 2 hours on the batteries (i ran it for 2 hours straight to test the heatsink). i need to post some beamshots of this thing--it is so much fun!
the rest have less than 1 hour on them.
later,
Bob