Shelly RGBW 2 Controller WiFi Smart Remote Wireless LED Light Strip Dimmer RGB Home Automation Working with Android IOS System Alexa, Google Home, Mobile Phone App 2 PACK

Q: what is the maximum current for each of the outputs in a 12V DC application?

As per the specs written on Shelly’s website: 45W per channel on 12v 144W combined on 12v 90W per channel on 24v 288W combined on 24v

Q: What rgbw strips do every one recommend with these for really good color/whites and brightness?

I have been using this and I really like them. I don't run colors that often -- although they look very nice. I typically use the strips in warm white mode. LEDENET RGBWW LED Strip 4 Colors in 1 SMD 5050 RGBLEDENET RGBWW LED Strip 4 Colors in 1 SMD 5050 RGB