Lighting
Lighting Wall-Plug Efficiency Calculator
Lighting Wall-Plug Efficiency is a worksheet for comparing one electrical condition at a time, with the result tied to its inputs.
Run a Lighting Wall-Plug Efficiency check
The defaults only show how Lighting Wall-Plug Efficiency works; replace them with values for the actual equipment or period.
Inputs to verify for Lighting Wall-Plug Efficiency
Collect Visible optical power, and Electrical input power from the same operating case before reading wall-plug efficiency.
- Visible optical power
- Enter visible optical power in W. Default shown: 28 W.
- Electrical input power
- Enter electrical input power in W. Default shown: 100 W.
When visible optical power is uncertain, run a low and high case instead of hiding that uncertainty in one entry.
How wall-plug efficiency is calculated
A clean Lighting Wall-Plug Efficiency result confirms the arithmetic for wall-plug efficiency; it does not prove the equipment rating or source data is the right one.
Only the entries shown on Lighting Wall-Plug Efficiency feed wall-plug efficiency. If another correction factor matters, keep it in the notes or make a separate run.
The formula uses Visible optical power, and Electrical input power to produce Wall-plug efficiency. Unit mistakes usually show up as an answer that is off by a factor of 10, 100, or 1,000.
The Wall-plug efficiency value and any supporting metrics belong to this same Lighting Wall-Plug Efficiency case, not to a nearby run with different inputs.
Applying wall-plug efficiency carefully
Read wall-plug efficiency together with the input values, not as a standalone fact. The same number can imply different decisions under a different equipment rating or operating period.
Lighting Wall-Plug Efficiency changes with mounting height, beam shape, surface reflectance, and driver limits.
Changing visible optical power while leaving electrical input power fixed is a useful way to see which assumption controls the answer.
Records for electrical input power
Keep fixture model, mounting height, distribution angle, and target plane with the Lighting Wall-Plug Efficiency result.
If a later Lighting Wall-Plug Efficiency run changes only visible optical power, label it as sensitivity work. Several changed conditions deserve a new baseline.
Candela Lumens is a separate worksheet; carry over wall-plug efficiency only with its units and source note.
Detail checks for wall-plug efficiency
Lighting Wall-Plug Efficiency depends on lighting geometry. Mounting height, spacing, beam shape, and surface reflectance can change the usefulness of the answer.
When wall-plug efficiency becomes an input to another worksheet, copy the value only after the units and source condition have been verified.
Using Lighting Wall-Plug Efficiency carefully
What should be recorded with the answer?
Save the Lighting Wall-Plug Efficiency inputs, unit basis, operating case, and result note so wall-plug efficiency can be reproduced later.
When should this be run again?
Run a new Lighting Wall-Plug Efficiency case when the source condition changes, such as voltage, load, rate schedule, temperature, component, connection, or period.