How to Calculate the Perfect Length of Linear Light for Your Space
Modern linear lights are sleek, versatile, and incredibly effective at shaping how a space looks and feels. But the question everyone asks is: what length should I buy? Get this right and the fixture looks intentional (not too short, not overpowering), illuminates evenly, and feels proportional to the furniture or room.
Below is a simple, field-tested method—followed by a quick calculator you can place on your product or category page.
Why Use a Lighting Calculator?
Lighting impacts more than visibility. The right level of illumination improves comfort, productivity, and aesthetics. Using a lumen calculator or light calculator for room size ensures:
Correct brightness for the function of the space
Energy savings by avoiding over-lighting
Balanced design without shadows or hotspots
Inclusive planning for diverse needs — from offices to homes and outdoor areas
Linear Light Length Calculator
Get an instant recommended fixture length based on your space, with side clearances.
Dining Table / Conference Table
Fixture length = 60–70% of table length
Keep 15–30 cm (6–12″) clear on each side
Hang height: 75–90 cm (30–36″) above tabletop
Kitchen Island
Single linear: 65–80% of island length, leave 20–30 cm (8–12″) each side
Multiple pendants: treat each segment ≈ 35–45% of island length, with 60–75 cm (24–30″) between pendants
Desk / Workbench
Fixture length = 70–100% of desk width (aim ≥ desk’s active task area)
Keep glare low; align center to working zone
Hallway / Niche / Console
Fixture length = 50–75% of the target span
Maintain clearance from edges to avoid a “wall-to-wall” look unless continuous lighting is desired
Wall-Wash or Cove Runs
For continuous runs, use the full visual span but break long lengths with joiners and drivers as required
Plan around access for drivers and service
Pro tip: If you’re between sizes, choose the shorter option for traditional interiors (subtlety), or the longer option for minimalist/modern spaces (bold line).
Identify the target span
Measure the length of the object the light relates to (table, island, desk) or the visual span (hallway, niche).Select the correct ratio
Dining / Conference: 60–70%
Island (single linear): 65–80%
Desk: 70–100% (based on task width)
Hallway / Niche: 50–75%
Check side clearances
Aim for 15–30 cm (6–12″) gap on each end so the fixture doesn’t look cramped.Confirm available sizes
NorthernCult offers customizable lengths—if you’re in between, we can tailor to the nearest centimeter.Consider optics & output
Long runs benefit from higher output and good diffusion. Add dimming for dining/meeting spaces.
Examples
180 cm (71″) dining table:
60–70% → 108–126 cm (42.5–49.5″) fixture length. Pick 120 cm for a clean proportion.300 cm (118″) conference table:
60–70% → 180–210 cm (71–83″). Consider a 200 cm linear or two 100 cm segments spaced evenly.240 cm (94.5″) island (single linear):
65–80% → 156–192 cm (61–75.5″). Choose 180 cm leaving ~30 cm per side.
Height & Spacing Cheatsheet
Above tables/islands: hang the bottom of the fixture 75–90 cm (30–36″) above the surface.
Over desks: mount high enough to avoid monitor glare; favor diffusers.
In hallways: keep to a clean line, centered.
Common Mistakes (and Fixes)
Too short: looks like an afterthought. Increase length or use dual fixtures.
Flush to edges: visually cramped. Add side clearance.
Hotspots/glare: choose opal diffusers, indirect optics, or add dimming.
Uneven brightness over long runs: specify adequate lumen output and consider multi-feed drivers.
- When selecting on NorthernCult, use the length guidelines above. If your size isn’t listed, choose “Custom Length”—we’ll fabricate to your specification and help with drivers, suspension, and finish options.
