A lighting profile determines the light level settings of a fixture. The light levels are used by the sensor along with the time of day, day of the week, and time duration to control the fixture’s light level.
To view a profile, select a Profile Instance from the Profile Templates in the left navigation panel and click Settings > Edit.
Periods of a Day and Week Days
The profiles support four periods of the day: Morning, Day, Evening, and Night. The Day and Evening periods may be set based on the astronomical clock, which provides the sunrise and sunset time. When lighting profiles are set based on the astronomical clock, you take advantage of the ample daylight available before and after sunrise or sunset. Sunrise and sunset are based on the building’s latitude and longitude. See Edit Building's Location Data.
The settings to set start times for periods of each day are shown below. You can choose to specify the Day and Evening periods to start based on the astronomical clock. You can also select start times based on the local time zone for each period.
Morning – This period comes after Night. A typical Morning period would be from 6 am to 7:30 am.
Day – A typical Day period would be from 7:30 am to 5:30 pm. The Day may be set to start with the sunrise. Choose a time offset in the range of 15, 30, 60 minutes to start the day before or after sunrise, so the lights turn off for a few minutes before or after sunrise. You may also enter up to 120 minutes before or after sunrise by typing in minutes—for example, Sunrise +75 min or Sunrise -120 min. In summer, when the Day period starts before the Morning period, the morning period is skipped.
Evening –A typical Evening would be from 5:30 pm to 8:30 pm. The Evening period may be set to start with sunset. Choose a time offset in the range of 15, 30, 60 minutes to end the day before or after sunset. Based on the time offset, the lights are turned on for a few minutes before or after sunset. You may also specify up to 120 minutes before or after sunset by typing in minutes—for example, Sunset +75 min or Sunset -120 min. In winter, when the Evening period is set to start after the night period starts, the evening period is skipped.
Night – The period that comes after Evening and before the Morning of the next day. A typical Night period would be from 8:30 pm to 6 am.
Week Days – The configuration allows any day to be classified as a weekday or weekend day.
Profile Basic Attributes
For each period of the day, the profile has the following weekday and weekend settings.
- Min light level when on (0-100) (%) – The minimum level between 0 and 100 percent to set the light. Typically, this should either be zero for a private office or around 20 for an open office when occupants are present. Setting the value to 0 allows light to be turned completely off when no occupant is present or if ambient light is abundant. The value of this attribute has two purposes, which are:
- The setting below a value results in the bulb flickering or not illuminating. If this occurs, then the value should be increased until these behaviors no longer occur. Note that the Dim and linger's value (found in the Advanced menu) should have the same value.
- A value greater than zero prohibits the fixture from turning off the lights, which is appropriate for security lights or for locations where turning the lights on and off would distract occupants. For example, in an open office environment, the min level should be set greater than zero during working hours, so the lights do not turn off. However, during periods when only the cleaning staff may be present, it would be appropriate to set the value to zero.
- Max light level when on (0-100) (%) – The maximum level between 0 and 100 percent to set the light. This is the value that can be reduced when there is too much illumination by the light. Typically, the value would be between 60 and 80, which should be reduced to no less than 25 or 30. The value of this field restricts the maximum light level. Typically, during the lighting design of a building, the usage of the building is not known. Also, over time as bulbs age, the light output slowly decreases. There also may be some occupants who are adversely affected by bright lights. Thus, use this attribute to reduce the light level to an appropriate value. Note that by reducing the value, energy will be saved.
- Ramp-up time (0-10) (sec) – The length of time to change a light that is off to its required light level value. For example, when the value is 10, a light that is off will be brought up to the needed light level over 10 seconds when it is turned on. Note: During override commands issued by an API call or BACnet, the command will take effect after the ramp-up time set in the profile ends.
- Active motion window (1-200) (min) – The length of time to hold a light on after motion has not been detected. When it is expected that the lights should be on during working hours, the value should be a longer length of time, such as 15 minutes. During other times, specify a short length, such as 3 minutes. When the occupants under the fixture are still, the value may be increased to a longer duration, such as 30 minutes, to reduce the number of times the light level is reduced. Note that when Title 24 for a site is enabled, the Active Motion window must be set to less than 20 minutes. The shorter the Active Motion window, the more energy is saved.
- Motion sensitivity (0-10) – Determines a sensor’s sensitivity to continuous motion to detect occupancy. Setting the value to 0 will cause the fixture to behave as if an occupant is always present, such as an area that needs to be continuously lit at night. The default value of 1 causes the fixtures to be more reactive to motion. Specify a higher value for fixtures in open offices to ignore passersby in open corridors.
- Ambient sensitivity (0-10) – Determines a sensor’s sensitivity to ambient light. Determines if the light will be dimmed due to ambient light. The value 0 means that the light will not be dimmed; the sensor will not react to ambient light. The value 10 indicates that the light is most sensitive to ambient light. Daylight harvesting mode is most effective when this value is set to 10, so the lights can either turn to the minimum light level or switch off depending on the value set in the Min. light level column for that period. See Enabling Daylight Harvesting.
Note that there are four additional settings for ambient light in the Advanced Lighting profile menu shown below, which control how often and how much the light levels may change. These values need not be changed, but if you would like to tweak the values, contact Enlighted Support for assistance.
- Adjust fixture light levels when ambient light levels drop – The drop (5 – 25) (%) and rise (5 – 25) (%) is the percentage change of the ambient light that is needed to trigger a change in the light level.
- Only change fixture light level after the ambient light level is stable – Time in seconds to wait for ambient light changes to be stable before changing the fixture light level. A typical value is 10 seconds. Larger values slow down the reaction to changes in ambient light.
- Change fixture light level due to change in ambient light level no more than once – Length of time in minutes to wait before the fixture light level can be changed due to a change in the ambient light level. This is to avoid rapid cycling in fixture light levels due to passing clouds, which irritates occupants. A typical value is 10 minutes.
- Dim and linger – Linger light level before off (0 - 25) (%) – The fixture's light level before turning off. When turning a light off due to lack of occupancy, the light fixture will first be set at this level for the length of time specified in this field and then turned off.
Linger time before off (0 – 600) (sec) – The time in seconds to keep the fixture on before turning it off. This field is used to specify the behavior before turning off the light due to a lack of occupancy.
- Fixture initially turns on – The fixture turns on at 50% for 5 seconds before adjusting the lights based on the profile.
- Background Light level to 50% - Enable this field to set the background light level to 50% of the profile max when there is no motion.
- Highbay – Enter 1 to enable the lighting profile for Highbay sensors mounted above 25' else enter 0.
- Motion Threshold – The following are some possible reasons to modify the values of this field.
- The lights turn off even when there are occupants present.
- The lights turn on when passersby (transient) motion is detected.
- The lights turn on due to false triggers of motion.
- The lights delay too long before turning on.
- Refer to the article Effect of Motion Sensitivity, Active Motion Window, Motion Threshold on the Light Level due to Motion.
- Holiday Override Profile – To schedule Holiday Overrides, select an override from the Holiday Override Profile drop-down box. For details, refer to the article Configure Demand Response and Holiday Behavior.
- Daylight Harvesting – The following Profile attributes settings are for Daylight Harvesting. For a detailed description, refer to the article Daylight Harvesting.
- Enable Daylight Harvesting Override mode – Select this option to enable daylight harvesting.
- Allow Daylight Harvesting to dim lights below the minimum light level – Select this option for the lights to turn off. Daylight harvesting override mode is thus enabled, turning the lights off rather than merely dimming them to 15% of the min. light level specified in the lighting profile. Refer to the article Daylight Harvesting.
- At a time period change when there is no motion, allow a change in minimum light level to raise light levels – Select this option to turn on the lights to the profile minimum value at the beginning of the profile period.
- When motion is detected, ramp up to the target ambient light level over 3 seconds – Select this option to turn on the lights to the Ambient Light Level instead of the Max light level when motion is detected.
For outdoor lighting, see Setting Outdoor Lighting Profile Based on Astronomical Clock.
Other Recommended articles:
- Create or Edit Profile
- Assigning Profile to Sensors
- Effects of Motion Sensitivity, Active Motion Window, Motion Threshold
- Override the Light Levels of Fixtures
- Astronomical Clock FAQs