The LMLS-400 is a closed loop photosensor that measures the ambient light level in order to automatically switch or dim one zone of lighting. It is part of a Digital Lighting Management (DLM) system and sends light level signals to control loads connected to DLM on/off or dimming room controllers. The LMLS-400 has a photodiode with an extended range of 1-10,000 footcandles (fc), and photopic correction to mimic the human eye, for precise measurement of visible light.
  • Daylight responsive on/off, bi-level, tri-level or dimming control for one lighting zone
  • Component of Digital Lighting Management integrated control system
  • 100 degree spatial response for optimal detection of ambient light level
  • Automatic calibration and configuration
  • Photodiode corrected to match the photopic response of the human eye
  • Can be calibrated in any daylight condition


General Info
Type: Single Zone, Closed Loop
Typical Applications: Private Offices, Cafeterias, Classrooms Atriums, Lobbies
Technical Info
Light Output 1FC D: On/Off, Bi-level, Tri-level or Dimming Control
Volts: 24 VDC
Cutsheet Download
LMLS-400 Single Zone Switching and Dimming Closed Loop Digital Photosensor PDF
Digital Lighting Management (DLM) System PDF
Installation Instructions Download
LMLS-400/400-L DLM Closed Loop Single Zone Photosensor PDF
LMLS-MB1/MB2 DLM Photosensor Mounting Brackets PDF
BIM Models Download
LMLS-400 Single Zone Switching and Dimming Closed Loop Digital Photosensor ZIP
WS Bulletin / Whitepaper Download
#TB-185 DLM Operation with LMLS-400 Photosensor, v2.xx PDF
CAD Drawing Download Preview
90-631 - LMLS-400 Single Zone Closed Loop Digital Photosensor
90-921 - Classroom w/Daylighting
90-952 - Large Office w/Daylighting