As it is currently, adjusting the brightness for a bulb, either by way of a rule, a schedule, or by way of the bulb or group adjustment UI, turns an off bulb on and adjusts the brightness to the input setting.
Since this is the way it is currently designed to operate, this would be a Feature Request by way of the Wishlist.
Fortunately, the request has already been entered into the Wishlist. Follow the link, vote for the request at the top, like 
some posts, and add your reply to the bottom with your use case need. The topic tags appear they also need to be updated to include the BR30 bulbs.