Own formula

	Calculation		Catalog
	About		Help

Find a formula

Photometry

Light flux

Light flux

luminous flux

Φ =

lm

		x
lm

luminous intensity, constant inside solid angle Ω

I =

cd

		x
cd

solid angle

Ω =

sr

		x
sr
□°

1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"