This unit will have an LED 24VDC light, P/N 728-00-5116, on a 26" X 12" mounting plate, P/N 728-00-5216, and a 120VAC to 24VDC power supply.  It would replace the very large light boxes used on many of the older blast cabinets. Flat on a table this unit is less than 1.75" tall. The mounting plate should be sealed to the cabinet top and secured with fasteners of your choice. There are sacrificial underlayment under the light housing. If all is properly sealed you may see an improvement in the dust collection system.