Downlight Retrofit Energy and Fit Planner
Check downlight replacement cut-out fit, dimming compatibility, annual energy savings, and thermal review flags.
Calculator library
Latest calculators
Downlight Cut-out and Replacement Planner
Compare an existing downlight cut-out with a replacement fitting and flag basic access and depth checks.
Downlight Count by Spacing Calculator
Estimate rows, columns, and fixture count from room dimensions and a maximum spacing assumption.
Dimmer Retrofit Compatibility Planner
Check connected load, dimmer range, dimming protocol, neutral requirement, and manufacturer compatibility for a dimmer retrofit.
Dimmer and Driver Compatibility Planner
Compare dimmer and driver voltage, protocol, phase-cut, load-range, and manufacturer-confirmation inputs.
Residential Dimmer Compatibility Checker
Check basic load-range, dimmer-type, and LED driver compatibility inputs before an electrician reviews the installation.
Counter and Bench Task Lighting Planner
Estimate local task-light quantity and spacing for counters, benches, and service desks.
Constant-voltage Driver Matching Calculator
Compare driver output voltage and current against a constant-voltage LED strip load.
Ceiling Fan and Downlight Clearance Planner
Check radial spacing between a ceiling fan and planned downlight positions using a stated clearance assumption.
Lighting Cable Length and Voltage Drop Calculator
Estimate loop resistance, voltage drop, and end voltage for a lighting cable run.