Start with the activities and furniture
A room used for cooking, reading and eating has several lighting needs. Mark worktops, tables, seating, cupboards and walking routes on a plan. A regular ceiling grid may look symmetrical while leaving the most useful surfaces in shadow.
Consider where people stand and look. A light behind someone at a worktop may illuminate their back rather than the task. Over a sofa or bed, the view of a bright fitting can matter more than the brightness measured on the floor.
Choose brightness and beam spread
Choose brightness and beam spread
Lumens describe light output; watts describe electrical power. Two downlights with similar wattage can distribute their light differently. Beam pattern, room proportions and surfaces influence what the installed arrangement will feel like.
Share the exact product if you already have one in mind. Count, spacing and switching should be considered together. Adding more fittings is not always a better answer than using suitable fittings in the right places alongside task or feature lighting.
Check what is above the ceiling
Check what is above the ceiling
The ceiling construction, insulation and any fire-performance requirement affect product selection and installation. A fitting labelled fire rated is not automatically suitable for every ceiling arrangement, and insulation compatibility needs to follow the product instructions.
Describe the room above, loft access and whether the ceiling is open during renovation. Do not cut test holes or move insulation around electrical equipment to prepare the quote. Existing plans and safe overview photos are enough to start.
Plan the switching and dimming
Plan the switching and dimming
Decide which lights should operate together and whether dimming is useful. In an open-plan room, worktop lighting and a dining setting may need different control. A single switch for every downlight can reduce flexibility.
If you are changing the ceiling as part of a larger project, agree the point schedule and access dates before plastering. Ask the scope to include fittings or fitting supply, switching, checks, records and responsibility for making good.
What to share with your enquiry
- Room dimensions and ceiling height
- Furniture and worktop layout
- Activities in each part of the room
- Chosen fitting link, if any
- Ceiling access, insulation and renovation dates
Questions answered
Is one downlight per square metre a reliable rule?
No. It ignores output, beam pattern, room use, ceiling height and other light sources.
Ask Max about thisCan loft insulation cover LED downlights?
Only where the exact fitting is designed and rated for that arrangement. Other fittings need specified clearances. Follow the manufacturer’s instructions and have the ceiling and insulation arrangement checked rather than assuming all LED downlights can be covered.
Ask Max about thisCan I keep my existing dimmer?
That depends on the complete fitting, driver and dimmer combination. Include the control in the lighting plan.
Ask Max about thisWill more downlights stop shadows on my kitchen worktop?
Not automatically. A person standing between a ceiling light and the worktop can still cast a shadow. Mark the preparation surfaces and furniture on your plan, then consider fitting positions and task lighting together. The useful result matters more than filling the ceiling with extra fittings.
Ask Max about thisCan I compare LED downlights by wattage alone?
No. Watts describe power use, not the full lighting result. Compare lumen output, beam pattern, colour appearance and dimmer compatibility for the intended room. Send exact product details with a sketch of the space so the proposed number and positions can be considered together.
Ask Max about thisSources and further reading
Read the original guidance relevant to this question. Building Regulations and rental-law references here relate to England.