The Fluke L210 probe light kit consists of the Fluke L200 probe light and the Fluke TP280 test probe extenders. The bright white LED illuminates the contact area and the 8" probe extenders keep hands away from live circuits. The Fluke extender fits between the modular test probe and test lead. The Fluke L210 probe light kit offers 120 hours of battery life and uses two 3V watch batteries.