There isn’t any way to do this with the standard features except by creating a separate automation for each Bulb, which I know you said you did not want to do. And scenes are not going to solve this issue either, Although you may use them inside of another logic.
I think it may be possible to do with webcore, which is essentially a scripting language for smartthings, but you will need the help of some of the grandmaster coders to get it set up.
Hopefully one of them will see this thread and make some suggestions, or direct you over to the webcore forum for more help.
If you’d like to read a little more about what webcore is before going That route, see the FAQ: