Specifications translated into decisions

Lighting Basics

Learn lumens, lux, watts, Kelvin, CRI, RGB, RGBIC, diffusion, glare, sensors, protocols, power, IP ratings, and certification claims.

Decision framework

What changes the answer

Use these factors before comparing finishes, effects, or retailer listings.

Use lumens for output claims and lux for measured light on a surface.

Kelvin, tint, CRI, white channel, and surfaces work together.

Dimming, sensor, app, automation, and physical override need separate checks.

Record claim, verification status, source, model, and date.

Before a product shortlist

Verify the exact model, power requirements, intended location, warnings, and current seller.
Treat certification as claimed until the exact product record is matched with the issuing body.
Search the CPSC recall database and record the date; a no-match result is not a safety guarantee.
Stop use if the product becomes unusually hot, damaged, discolored, loose, or electrically unstable.