Does liquids that emit light when vibrated exist?
Find compounds that emit light under photolysis.

As that may involve radical production pathways, one can also try to apply sonolysis to the same compounds as:

H2O (with dissolved O2, N2,..) + Sonolysis -> *H + *OH 

Reference source: 'Free radical formation from sonolysis of water in the presence of different gases'), to quote:

"In this case, O2 reacts with •H to form •OH, indicating that the presence of dissolved O2 in water sonolysis gives additional amount of •OH. "

Also:

H2O2 + Sonolysis -> *OH + *OH 

Apparently, with applications, see, 'Bactericidal effect of hydroxyl radicals generated by the sonolysis and photolysis of hydrogen peroxide for endodontic applications'.

where it is likely that one may be able to replicate to varying degrees the action of light treatment.

Here is a source example citing the action of reactive oxygen species (ROS), which can be created by the UV photolysis of, for example, H2O2 (or sonolysis per reference above):

"In biological systems much attention is focused on the two free radicals, superoxide anion and hydroxyl radical....The generation processes of ROS can be monitored using luminescence. Because of the very weak native luminescence of ROS, both luminol and lucigenin have been used in the past to give measurable signals. However, the luminescence of these two substances is very small compared to that of Pholasin®, which allows precise analysis on very small samples."

So, perhaps try performing a sonolysis of, say, luminol or lucigenin, in H2O2 might be interesting.