Figure 2. Schematic representation of the light delivery apparatus embedded within the Lumicycle. The device is composed of an opaque matrix (below panel) that fits the shape of the five exposed dishes on the turntable and by a black cylinder reflective white inside containing the LEDs (SuperBright LEDs, top panel). Light intensity is controlled by a dimmer and neutral density filters. To avoid any light diffusion to the photomultiplier tubes during the light stimulation, the bottom edge of the cylinder was sealed to the contours of the matrix with light-impermeable seals inside the Lumicycle.