How to Install Glass Blocks With Electrical Lights

Plug the fiber optic illuminator into an electrical outlet near your installation area. Turn the unit on to test the fiber optic lights.

Place the power cord to the illuminator along your baseboards and staple it in place with a staple gun. Turn the illuminator off.

Lay your first course of blocks in a straight line on the floor or on a grid. Some manufactures have a bottom groove to place the blocks in, or they may have a grid with two sides and a bottom.

Slide a flat spacer on each end block with the groove pointing up. Slide an "H" spacer on each junction of blocks where two center blocks meet.

Place the fiber optic lighting rope into the groove of each spacer. Place clear tape on top of the fiber optic rope to secure it to each spacer.

Insert your second course of blocks on top of the first course, laying them in the spacers. Place spacers on the second course. Loop the fiber optic rope up one end of the blocks to reach the second course and lay it in the spacers. Tape the rope in place with clear tape to each spacer. Repeat this step until you have reached the height of glass blocks for your project.

Cut the tip of a tube of clear silicone sealant at a 45-degree angle with a utility knife. Seal the area where each glass block meets another both horizontally and vertically. Apply a continuous bead of sealant without any gaps. Seal around the perimeter of the glass blocks if they touch a wall in the same manner.