I am currently attempting to grow a culture of P. Acnes bacteria. Right now, my only hope in identifying colonies of the bacteria in the culture is to use a black light to find colonies that glow orange. I am not sure whether or not this will work since nutrient agar may not provide them with something that helps them produce porphyrins. It's also entirely possible that another form of bacteria contaminating the culture would produce the same effect.
I would like to entertain the possibility of buying a microscope for this project. I have never owned a quality microscope(just toy ones in the past), so I don't really know what type of microscope or what magnification I'll need in order to correctly identify and observe the P. Acnes bacteria.
What would be interesting is if I could turn this into a pharmacological project; if I can verify that I have the correct bacteria(to a fair degree of certainty, anyway), I can see how the bacteria reacts to different chemicals and environments.