EE STATED THAT HE WAS INSTALLING A 4 FOOT FLORESENT LIGHT BULB IN THE MAINTAINENCE VEHICLE BLD. HE STATED THAT HE WAS STANDING ON A SODA POP CRATE TO INSTALL THE BULB AND THE CRATE TURNED OVER AND HE FELL TO THE FLOOR LANDING ON HIS LEFT HIP AND LOWER BACK. EE STATED MISSING WORK AS A RESULT OF THIS INJURY ON 2-20-93.