Light (and lighting) by the numbers
Photo Friend: exposure calculator & light meter
Guide number - Wikipedia
A cheap digital light meter – Fup Duck Photography
Lux Calculator
Continuous Light Output: Lux, Lumens, and F-Stops - A Guide to Converting Different Units of Measurement - Draco Broadcast
Illuminance Converter • Photometry — Light • Compact Calculator • Online Unit Converters
Photo Friend: exposure calculator & light meter
Exposure Calculator
ISO Sensitivity and Exposure Index | Imatest
PRO Version (v5.0+) - Photometer.PRO
Convert Lux to PPFD - Online Calculator | Waveform Lighting
Light (and lighting) by the numbers
Shedding Light on Lumens, Lux and Latitude
Exposure Value vs Photographic Exposure vs Il/Luminance vs Pixel luminance measurements – pIXELsHAM
The 5 Best Smartphone Apps for Checking Exposure
Photo Friend: exposure calculator & light meter
How to Use a Camera to Measure Foot-Candles of Light for Houseplants | PetaPixel
properties/illuminance - calculator.org
ISO Sensitivity and Exposure Index | Imatest
The 5 Best Smartphone Apps for Checking Exposure
Is there a way to calculate how much light I will need?
