Field guide · light and hierarchy
Layer light by job, height and time of day
One bright source is not the same as a well-lit room. Useful light is layered: ambient light lets you orient, task light supports the work, and accent light creates hierarchy without asking the whole room to be brighter.
Field guide · light and hierarchy
Layer light by job, height and time of day
One bright source is not the same as a well-lit room. Useful light is layered: ambient light lets you orient, task light supports the work, and accent light creates hierarchy without asking the whole room to be brighter.
Read it
- 01Read daylight and electric light separately. Note what disappears after sunset.
- 02Identify the work surface, face, object or route that actually needs light rather than increasing brightness everywhere.
- 03Check glare from the normal seated and standing eye positions before adding another source.
Test it
- 01Turn off every nonessential lamp and add back one layer at a time.
- 02Move or borrow a lamp before buying one; keep the source temporary for the test.
- 03Repeat the same task at the time of day when the room usually fails.
What counts as proof
The proof is the task becoming easier or the room reading more clearly at the failing time — not simply a higher lamp count.
- Wiring, new circuits, recessed fixtures and other electrical work are professional territory. Room Lab can diagnose the need for a layer; it does not specify unsafe electrical work.
Where this comes from
links reviewed 2026-09-08
Demonstrations are optional learning aids and the standards are the floor under the method. Neither is evidence about your room: Room Lab does not treat a video as proof, and a link never replaces a measured test.
Read your room's layers and light
Practise this and continue
Step 4 of 9 · working
Try it in a real room. Sit in the room at night doing its actual job. Note which task you cannot do comfortably, and which single fixture is being asked to do everything.