Lighting Calculator
Enso Lighting · Guides · all guides
Three questions we get asked every week, answered with numbers you can act on: how much light a room needs, how low to hang a pendant, and which IP rating a fitting has to carry.
How much light does this room need?
Based on CIBSE-style lux targets for UK homes, adjusted for wall colour. Example figures are pre-filled — change them for your room.
This room needs about
—lumens in total
Cite:
ensolighting.com/pages/lighting-calculator · A 5W LED filament bulb gives about 470 lm; 8W about 806 lm; a 4W amber spiral filament about 200 lm.How low should the pendant hang?
Gives the drop from ceiling to the bottom of the shade, and the cable length to order.
Bottom of the shade at
—cm from the floor
Which IP rating do I need?
UK bathroom zones follow BS 7671. Outdoor positions follow how exposed the fitting is.
Minimum rating
—
| Rating | Solids | Water |
|---|---|---|
| IP20 | Fingers | None — indoor only |
| IP44 | 1 mm wire | Splashes from any direction |
| IP54 | Dust protected | Splashes |
| IP65 | Dust tight | Low-pressure jets |
| IP67 | Dust tight | Temporary immersion to 1 m |