In point-by-point photometrics, each light fixture corresponds to a single lamp. In order to aim multiple lamps, it is necessary to create multiple light fixtures.
We recommend creating two different types of fixtures in your project schedule in this situation:
- A fixture that will be circuited, looped, and displayed in the schedule. Insert one of these fixtures on the drawing for each fixture in your design. In the light fixture project schedule, fill out all of the information for the fixture, including the total load for the fixture. This fixture will be displayed in the schedule, so make sure that all of the appropriate description, model, and notes information is filled in.
- A fixture that will be used for each lamp. Insert one of these fixtures on your drawing for each lamp on a fixture. If you have a fixture with two lamps, insert two of these fixtures. In the light fixture project schedule, uncheck the “Include in Fixture” box. This fixture needs only the information necessary for photometrics. This includes selecting an IES file, and setting the “Number of Lamps,” “Lumens / Lamp,” and “Lamp Depreciation.”
Insert one of the first fixture for each fixture in your project. This is the fixture you will circuit and loop. Do not check the “General Light” or “Egress Light” boxes for this fixture.
Insert one of the second fixture for each lamp on your project. These fixtures will be used in the photometric calculations. Check either the “General Light” or “Egress Light” box for this fixture, depending upon the type of calculation you are doing. Set the “Elevation” and “Tilt” as appropriate. Rotate the fixture on the plan to point in the correct direction for the lamp. You can also use the “Aim Light Fixture” command to set the tilt and rotation.