About Recessed Light Calculator
Recessed Light Calculator is a free browser tool for preliminary general lighting in rectangular rooms. Change room dimensions, target illumination and fixture lumens, preview a 2D recessed-light layout, and export PNG or CSV for discussion. The results are illustrative planning estimates, not measured photometrics or an electrical installation design.
Recessed Light Calculator helps homeowners explore an initial recessed-light arrangement before discussing a project with a qualified professional. It is intended for a simple rectangular room and general illumination, rather than a finished lighting specification.
Enter the room dimensions, target illumination and fixture lumens to compare an estimated fixture count with a 2D layout. The inputs can be changed to explore different scenarios. PNG and CSV exports preserve a visual plan or fixture positions for later discussion without requiring an account.
The main layout uses illustrative utilization and light-loss assumptions of UF 0.55 and LLF 0.8. A separate lumen calculator on the website lets readers experiment with those factors when learning the lumen method. Supporting guides discuss spacing, dimensions and budget considerations.
These estimates do not replace an IES photometric simulation, on-site lux measurements, circuit design, local-code review or installation approval. Real room surfaces, obstructions, fixture distributions and task lighting can require a different design. Use the tool as an early planning aid and verify the final specification separately.
Enter the room dimensions, target illumination and fixture lumens to compare an estimated fixture count with a 2D layout. The inputs can be changed to explore different scenarios. PNG and CSV exports preserve a visual plan or fixture positions for later discussion without requiring an account.
The main layout uses illustrative utilization and light-loss assumptions of UF 0.55 and LLF 0.8. A separate lumen calculator on the website lets readers experiment with those factors when learning the lumen method. Supporting guides discuss spacing, dimensions and budget considerations.
These estimates do not replace an IES photometric simulation, on-site lux measurements, circuit design, local-code review or installation approval. Real room surfaces, obstructions, fixture distributions and task lighting can require a different design. Use the tool as an early planning aid and verify the final specification separately.
