Sheet steel housing suitable for ceilings with visible T-rails, concealed symmetrical rail constructions and cut-out ceilings, light distribution directly radiating using a micro-prism panel made of PMMA, a soft light is transmitted to the outside with frosted diffusers, light color neutral white (840) with very good color consistency and high color rendering Ra>80, for computer workstations, 65° < 3000 cd/m² all-round glare protection in accordance with the current standard DIN-EN 12464-1, LED driver design integrated. Master light variant LC01 with built-in control unit and sensor for daylight and presence-dependent control of up to 31 slave lights DALI, wired ready for connection via 7-pin connection terminal with plug-in contact technology. Functions: Light control with app connection via Bluetooth, free app for IOS and Android available in the App Store, on/off, manual dimming and setpoint setting using standard buttons, daylight-dependent control, presence function. System components used: LC-OM DALIecoBT control unit, LC-OM DALI LS/PD LI light and presence sensor. Connection of up to three additional sensors possible. Luminaires with sensor, to extend the presence area, on request. For description, see the Light Control chapter.