ELECTRICAL SIGNAGE: INTERIOR SIGNS ELECTRICAL SIGNS DIMENSIONAL SIGNS VEHICLE GRAPHICS POINT OF PURCHASE BANNERS more photos> Electrical signs from Sign Design are a shining example of form and function working hand in hand. Our experience includes: channel letters, new monument construction, pole signs, LED signs, refurbishing old signs and repairing your existing signs. From project planning and design to city permitting and final installation, you can count on Sign Design for a smooth, no–hassle project.