LED Lighting Requirement Calculator - Charlston Lights
Lumens Calculator: How Many Lumens Do I Need for a Room? – Insights
Convert Lumens to PPF - Online Calculator | Waveform Lighting
Incandescent Light Bulb LUMEN DESIGN METHOD Where: N = E A F UF LLF N = number of lamps E = level of illuminance A = Area at working plane. - ppt download
Lumens to Lux Converter for LED strips - based on tape-length
Lumen Calculator: So Many Lumens You Need - LampHQ