Design My Lights vs Visual Interior Tool: Which Should You Use?
The verdict
Design My Lights and Visual Interior Tool are both home & construction design tools, compared here side by side. Design My Lights is truly free (Free) and runs in any web browser with nothing to install; Visual Interior Tool is truly free (Free) and runs in any web browser with nothing to install. They differ most on 3D: Design My Lights offers basic 3d and Visual Interior Tool offers no 3d rendering.
Free tiers & pricing last verified Jun 23, 2026.
Pick Design My Lights if…
Truly freeHomeowners previewing holiday lights
Pick Visual Interior Tool if…
Truly freeQuick interior fixture-count estimates
Side by side
Design My Lights
Truly freeCompletely free with no account; upload a house photo, drag lights along the roofline and get a photorealistic nighttime preview.
Visual Interior Tool
Truly freeCompletely free web lumen-method calculator for a rectangular room; gives average illuminance and fixture spacing only, not full point-by-point analysis.
Read the full reviews
Design My Lights
Completely free with no account; upload a house photo, drag lights along the roofline and get a photorealistic nighttime preview.
Visual Interior Tool
Completely free web lumen-method calculator for a rectangular room; gives average illuminance and fixture spacing only, not full point-by-point analysis.
Design My Lights vs Visual Interior Tool: questions, answered
What is the main difference between Design My Lights and Visual Interior Tool?
They differ most on 3D: Design My Lights offers basic 3d and Visual Interior Tool offers no 3d rendering.
Is Design My Lights or Visual Interior Tool free?
Design My Lights is truly free and Visual Interior Tool is truly free. Design My Lights: Completely free with no account; upload a house photo, drag lights along the roofline and get a photorealistic nighttime preview. Visual Interior Tool: Completely free web lumen-method calculator for a rectangular room; gives average illuminance and fixture spacing only, not full point-by-point analysis.