Overview
In Enlighted Manage (EM), the Energy Consumption tab displays energy usage and savings. The energy savings are calculated based on either Fixture-level Energy Savings or Contractual Baseline Energy Savings. This article describes the procedure to calculate Fixture-level Energy Savings. The Contractual Baseline Energy saving is stipulated in the customer’s contract based on the annual baseline energy savings for the campus, building, or floor level. For setting the Contractual Baseline Energy Savings, refer to the Contractual Baseline Energy Savings.
Fixture-level Energy Savings
This is the default method used by the EM to calculate energy consumption and savings for a fixture. Energy savings are calculated against the baseline. The baseline can be determined using any one of the following options:
Option 1: If the ballast Baseline Load has been determined manually for a ballast, use the value as the baseline for all fixture types with similar ballast.
Option 2: When the ballast Baseline Load has not been defined, and the fixture wattage was calculated by setting the fixture to 100% (Full on) dim level, set the fixture baseline according to the calculated wattage at 100% dim level. (See Option 4 for special case handling).
Option 3: If neither the ballast Baseline Load has been defined, nor the fixture dim level has been set to 100%, use the Ballast Wattage as the baseline for the fixture.
Option 4: When the ballast Baseline Load has not been defined, and the fixture was set to 100% (Full on) dim level, and if the Ballast Wattage is greater than the calculated wattage at 100% dim level, then the baseline for the fixture is set to the Ballast Wattage instead of the calculated wattage.
Each of these options is explained in detail in the following sections.
To set the Ballast Baseline Load and Ballast Wattage parameters, navigate to Administration > System Management and select the Fixture Type Management tab. The following screen is displayed, listing the type of ballasts available.
Select the desired ballast, and click the Edit button to open the Edit Ballast window as below:
Typically, ballasts are designed to operate with a specific Input Voltage, Lamp type, No. of Lamps (one to four), Ballast Factor, and Wattage. Refer to the corresponding Ballast Spec Sheet for ballast details.
Option 1
If the ballast Baseline Load has been determined manually for a ballast, use the value as the baseline for all fixture types with similar ballast.
In the above case, enter the predefined established ballast Baseline Load value in the Baseline Load field and ignore the remaining fixture type fields, as shown below:
Click Save to save the information in the database.
The EM system will use the Ballast Baseline Load (predefined established Baseline Load) to calculate the savings in the Fixture Energy Consumption. In EM, select Energy Summary > Load > Current Baseline to view savings.
Option 2:
When the ballast Baseline Load has not been defined, and the fixture wattage was calculated by setting the fixture to 100% (Full on) dim level, set the fixture baseline according to the calculated wattage at 100% dim level. (See Option 4 for special case handling).
In the above case, since Ballast Baseline Load is not known, leave the Baseline Load field empty as shown below:
Click Save to save the information in the database.
The EM system will calculate the wattage at 100%, which will be used as a fixture instance Baseline Load. This Baseline Load will then be used to calculate savings in the Fixture Energy Consumption. In EM, select Energy Summary > Load > Current Baseline to view savings.
Option 3:
If neither the Ballast Baseline Load has been defined, nor the fixture dim level has been set to 100%, then the Ballast Wattage is used as the baseline for the fixture.
In the above case, leave the Baseline Load field empty, as shown below:
Click Save to save the information in the database.
The EM system will set the baseline load as Ballast Wattage.
where,
Ballast Wattage = No. Of Lamp * Ballast Factor * Wattage = 52.90 ≈ 53 = (2*1.15*23).
This Baseline Load will then be used to calculate the savings in the Fixture Energy Consumption. In EM, select Energy Summary > Load > Current Baseline to view savings.
Option 4:
If the Ballast Baseline Load has not been defined, and the fixture was set to 100% (Full on) dim level, but if the Ballast Wattage is greater than the calculated wattage at 100% dim level, the baseline for the fixture is set to the Ballast Wattage instead of the calculated wattage.
This is explained in the following two use cases:
Use case 1: Ballast Wattage is slightly larger than the calculated wattage.
The EM system will calculate the wattage at 100%, which will be used as a fixture instance Baseline Load.
This Baseline Load will then be used to calculate the savings in the Fixture Energy Consumption. In EM, select Energy Summary > Load > Current Baseline to view savings.
Use Case 2: Ballast Wattage is far greater than the calculated wattage. Ballast Wattage is used when the Ballast Wattage is greater than the calculated wattage by at least 8% of Ballast Wattage.
Instead of using calculated wattage at a 100% dim level, the EM will use Ballast Wattage as a fixture instance Baseline Load.
This Baseline Load will then be used to calculate the savings in the Fixture Energy Consumption. In EM, select Energy Summary > Load > Current Baseline to view savings.
