Super unique unit from ETA Systems. This is the Fluorostrobe unit that uses a standard 4 foot 40 watt Philips flourescent tube and changes the output from a standard blacklight to a blacklight strobe light. The unit can also run as a standard blacklight if desired. There is a selector switch that puts the light into strobe mode and an adjustment knob for the flash rate. These were produced in the 90's and I do not think many were produced. Unit is made very well with thick gauge metal and acrylic front protector. Great unit made in the US!