Lumen Requirement Calculator
Turn a target brightness into real fixtures. Enter the room's area and target lux, and the lumen method gives the total lumens and how many fixtures deliver it.
~150 living, ~250 kitchen, ~400-500 desk/counter/mirror. Use the lux calculator to pick.
A typical LED downlight ~600-1000 lm; a 9W bulb ~800 lm; a big panel ~3000+ lm.
Utilisation ~0.55 for a normal light room; maintenance ~0.8 for dust and LED ageing.
at 800 lm each, for 200 lux over 13 sq m.
(lux x area) / (utilisation x maintenance)
This is the ambient layer. Add task and accent fixtures on separate switches on top — don't just make one layer brighter.
Indicative only. The lumen method sizes the general (ambient) layer; it does not place fixtures or handle task and accent lighting, which a good scheme layers separately. Real fixture lumens and utilisation vary — confirm the layout and let a licensed electrician do the wiring. Learn the method in the layered lighting guide.
Related Guides — Deep-dive reading
Home Lighting Design: Layers, Lumens & Room-by-Room Planning
How to light a home well — the three layers of ambient, task and accent light, how much light each room actually needs, why lumens matter more than watts, and a room-by-room plan you can hand to your electrician and designer.
Electrical & WiringCCTV Coverage Planning in India (2026): Think in Coverage, Not Cameras
Plan a home CCTV scheme by the coverage it produces, not the number of cameras you buy: map choke points, overlap so every camera is watched by another, keep entry-to-exit continuity, and set the pixels-per-metre each zone actually needs.
SecurityLighting Buying Guide India: How to Buy Fixtures & Bulbs Well (2026)
The practical, non-technical how-to-buy guide for home lighting in India — where to shop, how to read a bulb or fixture pack, the numbers that actually matter, buying by layer and room, spotting quality, and what to avoid so you never buy the wrong light twice.
LightingRelated Tools — You may also find these useful
Room Lighting Calculator
Estimate the target lux, total lumens and number of LED fixtures a room needs, from its type and size — a general-illumination planning guide.
LightingBeam Angle Calculator
The pool of light a spotlight or downlight throws, from the beam angle and distance, with a guide to the right angle.
Lighting CalculatorColour Temperature Selector
The right Kelvin for each room — warm to cool — with why it fits and the CRI to look for.
Lighting Planner