Figure 5.

Comparing phase-shifting responses to different 75 s light fractionation regimens. Representative actograms taken from flies receiving either: 15 s of light every 3 min (Protocol L, Row 1), a series of five 15 s pulses spaced 15 s apart (Protocol M, Row 2), or light stimulation for 25 s every 7 min (Protocol R, Row 3). All protocols began precisely at ZT23 and were completed by ZT23.25. Post treatment, animals were left to free-run in constant darkness (DD) for 4 days. Grey and black bars show the timing of the previous LD schedule, while asterisks and a dotted line mark the timing of light administration. Example actograms from each protocol are organized in temporally aligned columns to help visualize shifts in locomotor rhythms.