After collecting cockroach activity in my collection for more than a year now, I decided to make some graphs.
Each graph is made up of 505056 datapoints (measurement every 10 seconds for 2 months).
X-axis: hour of the day
Y-Axis: Activity level and light level in the enclosure.
Among the most interesting ones are the Therea bernhardti graphs. There you can see how the nymphs are active during the night, in contrast to the day-active adults.