Helping find the right hardware for an automated greenhouse

Hey all!
So, I’m at a bit of a standstill, and I think I need help from the community to see in what way I could pull off what I want to pull off. Trying to acquire the hardware that matches my needs has been proving more difficult than I originally anticipated.

I’d like to control a grow light, dim it, and turn it on/off from my OpenHAB setup. Essentially, I want to extend the photoperiod in my greenhouse, supplementing it with LED lights based on the sunrise/sunset times in my area, which I can get from an API easily.

The problem I’m running into is that there aren’t a lot of higher-powered grow lights (ones that are like, 1000W equivalent using 100W power) that have any kind of smart capabilities; let alone any that don’t force you into their own proprietary slop (cough vivosun cough). I could use a smart switch, but I’d really prefer to dim the lights remotely as well.
Oh, and if anyone ahs any suggestions for a fan I can also adjust things like intensity remotely that integrates into OpenHAB without much fuss, that’d be a huge help.
I know there are some smart dimmers that are out there intended for string lights I could use for this…maybe? I’m not sure how to handle this problem lol.

Any help or suggestions would be greatly appreciated! Thanks guys!

But if you have a smart switch that’s connected to OH, you can do everything you need to do remotely. That’s kind of the whole point of OH.

I imagine the big challenge would be finding a grow light that supports a dimmer switch. Not all LED bulbs do so and not all LED bulbs that claim to do so do it well. But assuming you have the bulb, you should be able to use something like a zigbee or zwave lamp module that supports dimming, a shelly (not sure which model but more than one supports dimming) or a dimmable smart wall switch. That’s what connects to OH and is controllable from OH. The bulb becomes a dumb bulb at that point.

I can’t help much with the fan except to say that I think there is a tutorial on here from many years ago that talked about using a dimmer module, same as you would use for a light, to control the speed of a box fan. I can’t remember if that worked or not though or how well it worked. I figure either it worked or it destroyed the fan. I don’t know of any smart fans that can be controlled directly though I’m sure they exist.

I use frequency drive that communicates Modbus with OH to change motor speed. That might be option for you.