Technical guides
Engineering explanations, sizing methods and calculations for lighting projects.
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How Many Rainy Days Can a Solar Street Light Last? Autonomy Explained
What 'days of autonomy' really means for a solar street light, why datasheet figures are often optimistic, how to check a light against your rainy season, and what to change when the battery is too small.
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Road Lighting Classes Explained: EN 13201 M, C and P Classes (with Lux Values)
What the EN 13201 road lighting classes mean, the luminance and illuminance each class requires, how to choose the class for a road, and what it means for street light wattage, pole height and spacing.
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How Many LED High Bay Lights Do I Need? A Warehouse Lighting Layout Guide
Work out how many LED high bay lights a warehouse, factory or sports hall needs: recommended lux levels, the lumen method step by step, spacing rules by beam angle, and a worked example for a 60 × 30 m warehouse.
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How to Calculate Solar Street Light Battery Capacity (with Worked Examples)
A step-by-step method to size the battery of a solar street light in Wh and Ah, from LED power, lighting schedule, nights of autonomy and depth of discharge, with three worked examples and the mistakes that make lights fail in the rainy season.
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LiFePO4 vs Gel vs Lithium-Ion (NMC) Batteries for Solar Street Lights
Which battery should a solar street light use? A comparison of LiFePO4, gel lead-acid and NMC lithium-ion on cycle life, usable capacity, heat and cold tolerance, safety, weight and lifetime cost.
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Solar Street Light Pole Height and Spacing Guide
How high to mount solar street lights and how far apart to space them, by road type and width. Includes layout rules for single-side, staggered and opposite arrangements, typical wattage by pole height, and a worked example.