Ultra easy to install (10 min on a wooden shelter, including disassembly and reassembly required the projector on its U bracket) this device delivers an ample light on a small courtyard of 15 m² and staircase leading to the away from the projector. 5 m cable between the photovoltaic panel and the projector offers an almost unlimited discretion in the choice of installation location. The charge state of the battery to deliver sufficient for all tests and settings without waiting for a refill. Manufacturing is serious, offers hope a good performance over time. The adjustments (duration ignition and ambient light triggering) are very simply, for each of these settings, selectable by a button working in sequence, a display shows values (for the period 0 to 9 or 3 to 600 sec 10 steps, to the ambient brightness 1-4 or 3-60 lux in 4 steps) to scroll using the second button. All this deserves 5 stars not: - Scope and a horizontal detection angle a bit limited: it is far enough from the "8-12 m" promised by the packaging and on these 2 points, detectors are widely sold in GSB better; - A limit in adjusting the position of the detector would have won either be detached from the projector, or to be fixed on a ball squarely, but it's really for being fussy!