LED Lighting Luminaire’s Photometric vocabulary
* basically parameters
luminaire lumens
effective luminous flux
luminaire efficiency
central intensity
maximum intensity
angle of maximum intensity
beam angle
intensity data distribution
iso illumiance

*indoor lighting parameters
basically parameters
up flux rate
down flux rate
maximum s/h
luminance limit curve
utilization factor table of indoor
budgetary estimate table

*spot led light parameters
basically parameters
half peak side angle
type B intensity data
zonal flux distribution table
space iso intensity curve

*road led light parameters
basically parameters
maximum s/h
up flux rate of stree
up flux rate of house
down flux rate of stree
down flux rate of house
zonal flux
iso candela diagram on circular web
coefficicen utilization curve