So, to preface, I have a grow lamp setup with dimmable leds. There is a teensy 3.5 controlling twelve FQP30N06L mosfets which drive twelve different vero 29 COB leds at around ~70 watts each. There are four different mean well lrs-350-48 (350 watt 48 volts) power supplies, split with 3 led's each. The default pwm frequency of the teensy is 488.28 hz. The leds are being dimmed all of the time so that I can control the color temperature within the room to simulate day/night cycles as well as winter or summer lighting. For example, in a set of 3 there might be two 5000k leds and one 2700k led, and the 5000's are running at 60% duty cycle while the 2700 is running at 30% duty cycle, etc, so that the load of all three never exceeds 300 watts. The issue this creates, at 488.28 hz is that it is impossible to film anything in the room due to horizontal banding and shutter interference with my gopro. Since gopro doesn't allow you to adjust shutter speed for timelapses, I was hoping to increase my pwm switching frequency. However, I noticed that my FETs heat up quite a bit at frequencies higher than 1000 hz, and at 7000 hz one of the power supplies failed. So basically, I need to figure out what the ideal switching frequency is for LED lighting and wanted to ask if anyone else has had experience dealing with this issue, and what you did to solve it.
TL;DR Need to film timelapse in room with LED lighting. Need to pwm led's for dimming control. Teensy 3.5 default switching frequency is 488.28 hz, which causes shutter interference/banding lines with go pro. Frequencies higher than 1000 hz cause mosfets to heat up. 7000hz caused power supply failure. What frequency do you guys use to pwm leds?