That’s a lot of light! 
There have been a few members in the past who had photography studios or workshops that needed that kind of light and there are a couple of options.
HIGH LOAD SWITCHES
Leviton makes a Z wave switch that can handle up to 600 W for LEDs (up to 1800 watts for incandescents). It works well with SmartThings as a basic zwave switch. Just make sure you get the right model, DZ 15 S. (The suffix after the S just indicates which box it comes in and what color it is.) Leviton makes a bunch of models that all use exactly the same outer case and look the same, but use different protocols: zwave, zigbee, Bluetooth, Wi-Fi, or works with HomeKit.
They even have a dimmer in the same line with similar specs. Here’s a thread about that one: