20 ~ 30 vdc driver Dimming possibility

Hello everyone,

I have a caee and im looking for your advice.

I have fixtures light with a power supply converting from 220v to 20~38 vdc 700ma .

Is there is away to dime the light using rgbw as far is my understanding rgbw works only with 12v or 24 v dc.

or Else i have only option to add shelly 1 or equivalent really only .

Thanks cheers