Problems, big problems.
If your reference to bulbs is light bulbs then yes they can be mixed. The led lamps have to be ballasted to use them in home lighting.
nothing happens
Nothing "happens".
Water and electricity generally shouldn't be mixed.
Hydrogen sulphide explodes when it is mixed with oxygen.
When magenta is mixed with yellow, it creates the color red.
BOOM!
you get warm.
nothing
when you mixed liquid to another liquid its mix together
What happens if I mixed 5/20 and 5/30 synthetic oil together on accident
it explodes in your face