Abstract: Operation of one or more luminaires (120) of a horticulture lighting system is monitored, the horticultural lighting system providing lighting for plants (110) within an environment (100). A possible maintenance action to be performed on the lighting system is identified based on the monitoring. An effect on yield resulting from the possible maintenance action being enacted is determined and an output indicative of that effect is generated.

Abstract: An aquaculture luminaire (10, 12) generates below the water surface upward light (26) and downward light (24). The upward light (26) is all directed with an angle to the vertical greater than a threshold angle. The division of light between the upward and downward directions may be configurable. Alternatively or additionally, the threshold angle may be configurable so that it ensures the light exceeds the angle for total internal reflection at the water surface. In this way, the luminaire is adaptable to the intended installation position of the luminaire and/or the prevailing water surface conditions (e.g. waves).

Abstract: A system for estimating a harvesting time in a plant growing environment is configured to determine a light setting used by one or more light sources (11) to illuminate a section (45) of the plant growing environment with horticulture grow light. The light setting comprises at least a color component associated with the section of the plant growing environment. The system is further configured to obtain light measurement information from one or more color sensors (21) when the one or more color sensors are co-located with the one or more light sources. The system is configured to estimate a harvesting time for the section of the plant growing environment based on the light measurement information, an intensity of the color component in the light setting and a cultivation temperature protocol for the section of the plant growing environment. The cultivation temperature protocol comprises one or more assumed cultivation temperatures.