UV effects on bacteria time-lapse

Time-lapse footage of bacteria-covered petri plates growing after being exposed to UV light. UV light kills bacteria, with longer exposure times resulting in higher cell mortality.

The elapsed time is shown in each clip. The petri plates were incubated at about 37 degrees Celsius.

The lamp used has two 15 watt bulbs. The lamp has 110 volts and the wavelength is 254 nm, UV-C.