I have an old basement room with shallow ceilings and a terrible central ceiling mount "boob-light". I would like a nice array of recessed LEDs but cannot find guidance for my room's dimensions, the main issue being the ceiling height.
- Ceiling height: 82.5in (6.9ft)
- Width: 214in (17.8ft)
- Height: 136in (11.3ft)
Given the rule-of-thumb: "space your lights by ceiling-height divided by 2" each light should be about 41in (3.4ft) apart. Using this formula I would need ~5 x ~3 recessed lights. 15 lights is fine if it means nice uniform lighting, but I am not sure what lights I should choose.
In a similar sq-ft 8-foot ceiling room upstairs I used eight 6in LED lights to great effect.
I assume using 15 6-in (800-1100 lumen) lights in the basement space would be blindingly bright unless heavily dimmed. Is this a case where 4 or even 3 inch lights (300-700 lumen) would be appropriate? Do these smaller lights have a different "rule of thumb" for spacing?
Most of the recessed lights I see on HomeDepot's website have a beam angle of 109°-113°. Perhaps fewer of a larger-beam-angled-light would work?
Also what is the best minimum spacing from wall-to-light with such low ceilings?
EDIT: I am purely concerned with general lighting in a box room. No accent or task lighting.