Design fluorescent lighting for an area $100\backslash$deg x$40\text{'}$ with $13\text{'}$ ceiling and $3\text{'}$ workstation height where rough grinding of parts is performed. Fluorescent fixtures are to be flushed with ceiling with a cleaning schedule of every $24$ months. Ceiling and walls are painted white. Use $4\text{'}$ long, $40$ watts fluorescent lamps in an uncovered fixture. $2$ lamps per fixture.