The GLA-LDL-PC-0-10-WL-B is a dual-loop photosensor that continually measures ambient light, achieving the optimal balance of natural and artificial lighting in daylight harvesting applications. By harnessing natural daylight from windows and skylights, electrical lighting can be dimmed, reducing energy usage while maintaining a consistent light level for a more efficient work or living space. With an IP54 rating, the GLA-LDL-PC-0-10-WL-B is suitable for indoor, outdoor and wet location applications.

In closed-loop daylight harvesting applications, the GLA-LDL-PC-0-10-WL-B can be ceiling mounted directly above the primary work area. It measures all light within a 60° cone, which consists predominately of reflected light, acquiring the most natural approximation of changes in ambient light levels.

In open-loop daylight harvesting applications, the GLA-LDL-PC-0-10-WL-B can be ceiling mounted near a window or in the light well of a skylight. It can be directed toward incoming daylight and away from electrical lighting fixtures. The control system estimates the ambient lighting in the room according to the light level measured by the photocell.

The GLA-LDL-PC-0-10-WL-B includes hardware to facilitate flush or surface mounting to a drywall or drop-tile surface. Its simple 3-wire interface allows for direct connection to a Crestron® control system via a single Versiport I/O or analog input port, with 24V power taken from the Cresnet® network control bus.¹

Using an optional sensor integration module (GLS‑SIM or ZUMMESH‑JBOX‑SIM for a Zūm® J-Box, both sold separately), the GLA-LDL-PC-0-10-WL-B becomes a full-featured Cresnet device, streamlining the total lighting system. Cresnet provides a simple solution for configuring and wiring sensors as part of any complete Crestron system. The Cresnet bus is the communications backbone for many Crestron keypads, lighting controllers, shade motors, sensors, and other devices.