The table from the problem #4 is illuminated by a lamp placed on the ceiling. The lamp irradiate light ia all directions. The distance from the ceiling to the table is 5 meters. 1) What is the luminous flux [lumens] the lamp need to release? 2) What will be the power needed to produce the needed luminous flux if the lamp is a CFL lamp with an efficacy of 60 lumen/watt

The table from the problem #4 is illuminated by a lamp placed on the ceiling. The lamp irradiate light ia all directions. The distance from the ceiling to the table is 5 meters. 1) What is the luminous flux [lumens] the lamp need to release? 2) What will be the power needed to produce the needed luminous flux if the lamp is a CFL lamp with an efficacy of 60 lumen/watt