A method (100) and a device (105) for commissioning a lighting system (110) arranged in an indoor space (120), wherein the lighting system comprises a plurality of light sources (130a-e), are provided. The method comprises the steps of iteratively defining a position, P.sub.i, in the indoor space, setting the intensity level, I.sub.i, of at least one light source in a subspace, S.sub.i, comprising the position, P.sub.i, to an intensity level value, measuring a light intensity, I.sub.Li, in the position, P.sub.i, and registering a relation between the measured light intensity, I.sub.Li, in the position, P.sub.i, and the measured light intensity, I.sub.Li1, in the position, P.sub.i1, to a path register (150). The method further comprises the step of creating a navigation path (160) in the indoor space based on the path register.

An integrated ceiling device includes integrated ceiling device including an electronic device housing, a heat dissipating structure, a light source, and a reflection/refraction assembly. An air gap is defined between the electronics housing and other components allowing ambient air to flow therethrough for cooling.

A display system for displaying digital content includes one or more LED-based lighting channels adapted to generate a first light output in a first operational mode at a first circadian stimulating energy (CSE), and a second light output in a second operational mode, the second light output associated with a second CSE, and a long red near infrared energy (LRNE) output in a third operating mode.