Overview

In the Room Data dialog of CAD Input there are now options to control lighting using daylight factors. This information can be set to "No control", "On/Off" or "Dimmers"

These controls are not used with the Design Database steady state calculations or PartL/SBEM calculations.
They are only applicable to the Energy calculations within Dynamic Simulation.

Method

If the "On/Off" or "Dimmers" options are selected, Dynamic Simulation will consider switching or dimming a percentage of the lighting load for the room. The percentage is  controlled by the factors entered in the six boxes. The boxes should be filled from top left to bottom right.

A daylight factor is a percentage of daylight within the room. The Nimbus link from Design Database can be used to ascertain daylight factors. More information on this method can be found here.

For example:

• A figure of 3% in box 1 will instruct the Simulation calculation to assume that 100% of the lighting will be switched off if the daylight level in the room exceeds 3%
• A figure of 3% in box 1 and 5% in box 2 will instruct the Simulation calculation that 50% of the lighting will be switched off if the daylight exceeds 3%, and a further 50% will be switched off if the daylight level exceeds 5%