Trying to design a good comparative side by side test with a 126 watt penetrator against an HPS lightsource and its not obvious how to do it and have any usefull results at the end.
Plant choice is easy , C99x that many will be familiar with , identical soil/nutes ect and the only difference being the light.
Can equalise canopy temperature and humidity with a bit of ductwork.
Every picture taken under daylight bulbs and colour balanced.
Run the test twice back to back exactly the same way.
Feel a realistic comparison would be against a 250 sodium rather than a 400 but undecided.
Two questions are how many plants in what footprint would be fair , should a cooltube be used on the hps or should both be kept at 12 inches.
The spec suggests approximate coverage area of 2′ x 3′ at 12″ above your canopy so should the 250 be the same , room or box size not an issue for me but space is premium or fixed for many.
A cooltube allows to get within six inches i find on a 250 , however few people use them.
Led angle is 60 deg , would reforming the HPS reflector to the same angle help to compare.
Canopy height and penetration is another issue , my choice finish bushy at 24 - 30 inches , maybe something taller to test the penetration claims.
Keen to set this up and document in tedious detail but only if its more than just some pretty pictures and no data at the end of it , any suggestions would be very welcome.
Lots of local real world interest in a proper test as well , ebay shite has got leds a bad rep round here but riseing leccy costs and smart meters means a lot of people are considering paying for something that demonstrably works beyond veg.
Plant choice is easy , C99x that many will be familiar with , identical soil/nutes ect and the only difference being the light.
Can equalise canopy temperature and humidity with a bit of ductwork.
Every picture taken under daylight bulbs and colour balanced.
Run the test twice back to back exactly the same way.
Feel a realistic comparison would be against a 250 sodium rather than a 400 but undecided.
Two questions are how many plants in what footprint would be fair , should a cooltube be used on the hps or should both be kept at 12 inches.
The spec suggests approximate coverage area of 2′ x 3′ at 12″ above your canopy so should the 250 be the same , room or box size not an issue for me but space is premium or fixed for many.
A cooltube allows to get within six inches i find on a 250 , however few people use them.
Led angle is 60 deg , would reforming the HPS reflector to the same angle help to compare.
Canopy height and penetration is another issue , my choice finish bushy at 24 - 30 inches , maybe something taller to test the penetration claims.
Keen to set this up and document in tedious detail but only if its more than just some pretty pictures and no data at the end of it , any suggestions would be very welcome.
Lots of local real world interest in a proper test as well , ebay shite has got leds a bad rep round here but riseing leccy costs and smart meters means a lot of people are considering paying for something that demonstrably works beyond veg.