Make certain you have read the 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK manual thoroughly before attempting the 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK bulb replacement on your 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK. Without touching the surface of the 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK lens, remove the lens tube and set it aside. Write down the number from inside the tube's inner lip for the purpose of make, model or serial number for any future need to buy 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK replacement parts. Your bulb should be sitting just beyond the opening of the 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK body. Reach in with two fingers and disconnect the 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK bulb. Reverse these steps to re-assemble your 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK. This concludes the 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK review - be sure to read the entire 3M Company Closed DOUBLET Lens FXL Lamp Changer 4000 Lumens FLD DN Post CLK manual.