PHX LCL CTLR EXPERIENCED OPERROR WHEN FAILING TO ISSUE TIMELY GAR INSTRUCTIONS TO A CARJ LNDG AS BE10 WAS CLRING DOWNFIELD.

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WORKING LCL CTL S. 3 ARRS TO RWY 25R ALL CLRED VISUAL APCH; ALL SPACED APPROX 2 MI IN TRAIL. 7 DEPS FOR RWY 25R. FIRST ARR; AN E135; LANDED AND CLRED RWY 25R. SECOND ARR; A BE10; WAS NEXT TO ARRIVE. SIMULTANEOUSLY; AN A320 WAITING TO DEPART RWY 25R HAD A MAINT PROB AND REQUESTED A PLACE TO PARK FOR A FEW MINS. DUE TO CURRENT TXWY CONSTRUCTION AT THE RWY 25R APCH END; SPACE IS LIMITED AND I COORD WITH GND S TO MOVE THE ACFT. I LOOKED TO SCAN RWY 25L. I NOTICED THE BE10 APPROX 50 FT FROM EXITING THE RWY; THE CARJ WAS AT THE THRESHOLD. I TOLD THE BE10 TO EXIT WITHOUT DELAY. THE BE10 DID EXIT PROMPTLY; HOWEVER; THE CARJ WAS TOUCHING DOWN PRIOR TO THE BE10 BEING CLR OF RWY 25L. THE BE10 WAS NEARING H4 APPROX 6000 FT DOWN THE RWY AND CARJ WAS IN THE FLAIR; SO I FELT IT SAFER TO ALLOW THE CARJ TO LAND THAN TO SEND AROUND. THE CONTRIBUTING FACTORS TO THIS EVENT WERE THE ACFT WITH MAINT ISSUE; TXWY CONSTRUCTION AND CLOSURES; OUTSIDE AIR TEMP CAUSING ACFT TO TAKE LONGER TO EXIT; ACFT SEQUENCED BY APCH TOO CLOSE TOGETHER. ULTIMATE RESPONSIBILITY FALLS ON ME FOR NOT HURRYING THE BE10 OFF THE RWY SOONER.