Has anyone actually taken PAR readings with and without optics?
LED Optics Test
The test fixture is a 24" LED Strip Kit custom assembled for Corbins Exotic Pets Pets in Buffalo Grove Illinois.
The Heatsink is a 24" x 8.46" from HeatsinkUSA. The LED strips are 6 XR-E Royal Blue/White and 4 XRE Royal Blue. The drivers are MeanWell 60-48D. The four Royal Blue strips are driven at full power (at 9 volts appx 580mA) in 2 parallel series of 12 LEDs. The other Royal Blue/White Strips are driven by a single MeanWell 60-48D adjusted to 750mA at 9Vdc
The drivers were adjusted and the input voltage was provided by a Radio Shack Enercell. Par was measured 24" above the fixture center mass and 24" centered but 12 "œ to the side. The meter was an Quantum Flux Apogee meter MQ-200. Watts were measured with the common KillaWatt meter.
No Optics
Driver Input........PAR@24"........PAR@24"........Watts
Volts DC..........Center Mass....Center + 12"
9........................214................142... ...........186
7.5.....................180................128.... ..........162
6........................155................100... ...........124
4.5.....................104.................82.... ...........84
3........................78..................58... ............49
1.5.....................32...................22... ............21
60 Degree Optics
Driver Input........PAR@24"........ PAR@24"........ Watts
Volts DC...........Center Mass.....Center + 12"
9........................355................150... ............186
7.5.....................310................131.... ............162
6........................242................78.... .............124
4.5.....................202................66..... .............84
3........................131................43.... ..............49
1.5......................60.................18.... ..............21
70 Degree Optics
Driver Input........PAR@24"........PAR@24"........Watts
Volts DC...........Center Mass...Center + 12"
9........................432...............170.... ............186
7.5.....................348...............158..... ...........162
6........................301...............140.... ............124
4.5.....................262...............95...... ............84
3........................171...............65..... .............49
1.5.....................74.................30..... .............21
80 Degree Optics
Driver Input........PAR@24"........PAR@24"........Watts
Volts DC..........Center Mass....Center + 12"
9.......................330................183.... ............186
7.5....................292................174..... ...........162
6.......................254................143.... ............124
4.5....................190................109..... ...........84
3.......................125................53..... ............49
1.5....................56..................33..... ............21