Best Free Lighting Design Software
For free lighting design software, Design My Lights leads our ranking: Completely free with no account; upload a house photo, drag lights along the roofline and get a photorealistic nighttime preview. Design My Lights, Trunetto Smart Home Floor Planner and Visual Interior Tool are compared in full below — each with its real free-tier limits, platforms, and export formats spelled out before you sign up.
12 tools ranked · free tiers & pricing last verified Jun 23, 2026
How they compare
Ordered by overall fit — free-tier value, output quality, platforms, and ease.
Design My Lights
Truly freeCompletely free with no account; upload a house photo, drag lights along the roofline and get a photorealistic nighttime preview.
Trunetto Smart Home Floor Planner
Truly freeCompletely free with no signup; place smart lights/devices on a floor plan, see light-ambiance previews and export a PDF with a real-product shopping list.
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.
Artillumin
Free, with limitsFree to start designing festive illumination on a project photo with multiple garland types and export to JPG/PNG; heavier professional use moves to paid plans.
CHUBIC
Free, with limitsFree plan allows one project with AI lighting configuration, 3D preview and PDF plan export; more projects and full export need a $39/mo plan.
DIALux evo
Free, with limitsFull professional lighting calc/visualization is free forever; only luminaires from non-member manufacturers and IFC/BIM and Office export require the paid DIALux Pro subscription.
ReluxDesktop
Free, with limitsFree for personal, educational and commercial use with member luminaires; using non-member products needs a paid ReluxThirdParty license.
FX Luminaire My Design
Free, brand-lockedFree with a brand account; design nighttime landscape renderings on a property photo and export PDF proposals, but products are FX Luminaire-only.
LEDVANCE Lighting Layout Tool
Free, brand-lockedFree web tool to set target foot-candles, room size and reflectances and get a fixture distribution; only LEDVANCE luminaires.
Light ARchitect
Free, brand-lockedFree web and mobile app for instant outdoor/sports lighting layouts and photometrics, but only using Cooper/Signify fixtures.
Philips Hue app
Free, brand-lockedFree app with AR preview, 2.5D entertainment-area placement and SpatialAware room mapping; only plans and controls Philips Hue hardware.
e-conolight Lighting Layout Tool
Free, brand-lockedFree web indoor/outdoor layout calculator with printable summaries; models e-conolight's own fixtures only.
Design My Lights
Truly freeCompletely free with no account; upload a house photo, drag lights along the roofline and get a photorealistic nighttime preview.
Trunetto Smart Home Floor Planner
Truly freeCompletely free with no signup; place smart lights/devices on a floor plan, see light-ambiance previews and export a PDF with a real-product shopping list.
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.
Artillumin
Free, with limitsFree to start designing festive illumination on a project photo with multiple garland types and export to JPG/PNG; heavier professional use moves to paid plans.
CHUBIC
Free, with limitsFree plan allows one project with AI lighting configuration, 3D preview and PDF plan export; more projects and full export need a $39/mo plan.
DIALux evo
Free, with limitsFull professional lighting calc/visualization is free forever; only luminaires from non-member manufacturers and IFC/BIM and Office export require the paid DIALux Pro subscription.
ReluxDesktop
Free, with limitsFree for personal, educational and commercial use with member luminaires; using non-member products needs a paid ReluxThirdParty license.
FX Luminaire My Design
Free, brand-lockedFree with a brand account; design nighttime landscape renderings on a property photo and export PDF proposals, but products are FX Luminaire-only.
LEDVANCE Lighting Layout Tool
Free, brand-lockedFree web tool to set target foot-candles, room size and reflectances and get a fixture distribution; only LEDVANCE luminaires.
Light ARchitect
Free, brand-lockedFree web and mobile app for instant outdoor/sports lighting layouts and photometrics, but only using Cooper/Signify fixtures.
Philips Hue app
Free, brand-lockedFree app with AR preview, 2.5D entertainment-area placement and SpatialAware room mapping; only plans and controls Philips Hue hardware.
e-conolight Lighting Layout Tool
Free, brand-lockedFree web indoor/outdoor layout calculator with printable summaries; models e-conolight's own fixtures only.
How we picked
Every pick here is chosen on real-world fit — free-tier value, platforms, 3D quality, and export options. Read the full method on our how we rate page.