Define MHCP | Define MSCP

 Define MHCP

Mean Horizontal Candle Power (MHCP) is a measure of the luminous intensity of a light source in the horizontal plane. It is defined as the average luminous intensity of a light source when measured at various angles in the horizontal plane.

To determine the MHCP of a light source, the luminous intensity of the source is measured at various angles in the horizontal plane using a photometer. The measurements are then averaged to obtain the mean value of the luminous intensity in the horizontal plane, which is expressed in units of candela (cd).

MHCP is a useful measure for comparing the brightness of different light sources when viewed from a horizontal perspective, such as streetlights or outdoor lighting fixtures. The formula for calculating MHCP is similar to that of MSCP, but the integral is taken only over the horizontal plane.

Define MSCP

Mean Spherical Candle Power (MSCP) is a measure of the luminous intensity of a light source in all directions. It is defined as the average luminous intensity of a light source when measured at various angles around a sphere.

To determine the MSCP of a light source, the luminous intensity of the source is measured at various angles around a sphere using a photometer. The measurements are then averaged to obtain the mean value of the luminous intensity in all directions, which is expressed in units of candela (cd).

MSCP is a useful measure for comparing the overall brightness of different light sources, particularly those that emit light in all directions, such as light bulbs or lanterns.

Mean spherical candle power is the mean of candle
powers in all directions in all places.
MSCP = (Total flux)/4rt