I'm not sure an occupancy sensor would be the right tool for your application considering they are designed to turn lights on/off automatically. You may be better suited with a timer switch, like an LTB60, which offers controls for 10/20/30/60 minutes, as well as an option to have the lights stay on for 24 hours. It won't stay on "forever", but 24 hours may be enough time for your application. Of course, this does not have the ability to turn lights on automatically. If you find that a sensor is turning off prematurely, a multi-tech sensor like the OSSMT-GDW may work better, as its ultrasonic sensor is better for picking up minor movements than a typical infrared sensor only. Again though, there is no forever-ON option. Both will work with fluorescent lights, but please note that the timer does require a neutral wire.
Please call us at 800.824.3005 if you'd like to discuss your options further.