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Industrial Lighting GR Blog

Technical guides on foot-candle specs, retrofit ROI, IES standards, ASHRAE 90.1 compliance, and Michigan utility rebates. Written by senior lighting designers, for facility managers and operations leaders.

High-Bay LED Fixture Layout and Spacing: How Many Fixtures Your West Michigan Warehouse Needs

May 22, 2026

How to calculate high-bay LED fixture count and spacing for a warehouse. The lumen method, the spacing-to-mounting-height ratio, a worked 40,000 square foot Grand Rapids example, and how racking forces the layout off a clean grid.

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LED Color Temperature for Warehouses: 4000K vs 5000K vs 6500K in West Michigan

May 19, 2026

How West Michigan warehouses should pick LED color temperature. The 4000K, 5000K, and 6500K trade-offs on picking accuracy, worker fatigue, CRI, and rebate eligibility.

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Warehouse Emergency and Exit Lighting Compliance in 2026

May 15, 2026

OSHA 1910.37, NFPA 101, and Michigan code requirements for warehouse emergency and exit lighting. Egress foot-candle levels, 90-minute backup, the monthly and annual test schedule, and the citations inspectors write most often.

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Motion Sensors and Occupancy Controls for Grand Rapids Warehouses: 2026 Code, Cost, and ROI

May 12, 2026

Occupancy sensors and motion-based controls for West Michigan warehouse LED systems. ASHRAE 90.1 and Michigan Energy Code requirements, sensor types by aisle geometry, real warehouse savings math, and Consumers Energy custom-rebate angles.

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High-Bay vs Linear High-Bay LED for Grand Rapids Warehouses: Which Layout Wins?

May 8, 2026

Round (UFO) vs linear high-bay LED for West Michigan warehouses. Spacing, racking aisle behavior, foot-candle math, AGi32 model walkthrough, and which one wins by ceiling height and layout.

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Michigan Utility Rebates for LED Lighting Retrofits in 2026: Consumers Energy and DTE Programs Compared

May 5, 2026

A working 2026 guide to Michigan's two big utility rebate programs. Prescriptive vs custom paths, application steps, federal incentive stacking, and the mistakes that cost real money on West Michigan retrofits.

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LED Retrofit ROI: Real Payback Numbers for West Michigan Warehouses in 2026

May 1, 2026

Real ROI math for warehouse LED retrofits. Operating hours, watts saved, Michigan electric rates, Consumers Energy and DTE rebates. Includes a worked 100,000 sq ft Walker DC case example.

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Warehouse Foot-Candle Requirements: An OSHA and IES Guide for Grand Rapids Facilities

April 28, 2026

OSHA 1910.22 minimums, IES RP-7-2020 task targets, ASHRAE 90.1 power density caps, and how West Michigan warehouses spec LED to hit the right foot-candles without overlighting.

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