The 5.6 x 7.8 square meter shop is 0.58 meters long and has enough cylindrical structure for the luminous flux according to the 1350 lumen lambert law.
It is illuminated in relation to fluorescent LAMP. The effect of the electrodes on the lamp ends is neglected. The lamps are attached end to end and
you can agree to provide full line lighting of your measurements. It is made 2 meters according to the working plane of the lamps. The Wall, ceiling, and
reflections of the groundworks neglected. Find the luminous state at point P? See point P round like this, associated with C 1 and C2
The combination of the linear line is in the working plane just below the point. The thick line shows the lamps.

C2=1 m C1= 4 m B =3 m A2=1m A1=4 m lambalar