Shed Solar Lighting: From One Bulb to a Properly Lit Workshop

How much light a shed actually needs

Think in lumens, not watts. General movement-and-storage lighting wants around 100 lumens per square metre — a 6m² shed is happy with a single 600-lumen fitting, which a modern LED delivers from 6W. Bench work and reading want 300 lm/m² over the working area, and fine work — soldering, sewing, sharpening — wants 500+ lm/m² locally. The practical pattern for a workshop shed is therefore layered: one or two ceiling battens for general light, plus a dedicated task light over the bench. Total electrical load for a genuinely well-lit 8m² workshop: under 40W. This is why lighting-only systems sit in the cheapest tier on the costs page.

Choosing fittings: strips, battens, and bulbs

12V LED strip is the shed favourite for good reasons — it runs straight off the battery bus, sticks under shelves, and casts shadow-free light along a bench. Buy IP65-rated strip even indoors (shed condensation is real), and buy a grade brighter than you think: cheap strip fades and the 4.8W/m grade disappoints over a workbench, where 14.4W/m earns its keep. 12V LED battens and caravan-style dome lights give more punch per fitting for ceiling mounting. Avoid 230V fittings on small systems: running an inverter continuously to power a 9W bulb wastes 10–15W of standby draw — often more than the bulb — and couples your lighting to a component that can fail. Direct DC lighting keeps working when everything else sulks.

Colour temperature matters more in a windowless box than anywhere in the house: 4,000K (neutral white) reads as clean and keeps colours honest for paint and fabric work; 6,500K "daylight" strip looks bright in listings and feels like a morgue by hour two. For a shed that doubles as an evening retreat, 2,700–3,000K earns its place.

The wiring layout that avoids dim lights

Voltage drop is the classic 12V lighting fault: lights wired in a daisy-chain down 0.75mm² bell wire arrive at the far end of the shed visibly dimmer. The fix is layout, not expense. Run a single fused 2.5mm² (or better) feed from the distribution box to the centre of the ceiling, then branch short spurs outwards — a star rather than a string. Put the switch in the feed, not the spur, so one switch kills everything, and fit a small illuminated rocker so you can find it. For under £5 extra, add a PIR-switched low lamp near the door: the thirty seconds of automatic light while you fumble for the main switch is the single best comfort upgrade per pound in shed solar.

Security lighting without flattening the battery

An outdoor PIR floodlight is the most requested addition and the most commonly oversized. A 10W LED PIR flood is genuinely bright — comparable to an old 100W halogen — and at a few triggered minutes a night consumes a negligible 5–10Wh. The mistake is dusk-to-dawn fittings, which at even 5W burn 60Wh through a winter night: more than a small system's entire daily December harvest, as the sizing post shows. Stick to PIR triggering, mount the sensor where foxes do not own it, and your security light will never trouble the energy budget.

The shopping list, costed

For a well-lit 8m² workshop: two 12V/10W LED battens (£24), 2m of 14.4W/m IP65 strip over the bench with aluminium channel (£22), a 10W PIR flood (£18), an illuminated switch, fuse, and star-layout cabling (£20). Under £85 of lighting on top of any Tier 1 kit from the kit guide — and a 100W panel with a modest battery runs all of it through the year. If your lighting plan involves more rooms, longer runs, or higher stakes, describe it via the contact form and we will sanity-check the layout before you order.