The crystallized glass of the Sirius is a standard feature that creates a flicker-like swath of light. Ribbed glass can be purchased separately for a different lighting look. This line voltage light sets on post sizes of 4”, 4-3/8”, 4-5/8”, 5”, 5-1/2”, 6”, and 6-1/2”, and is available in the colors of black, white, natural brown, bronze, tan, and clay. Not all sizes are offered in all colors. Check with your MFOS representative for availability. Also, some sizes require a conversion base. Check with your MFOS representative for which ones that require a conversion base and which ones don’t. Matching post caps are available in most sizes and colors.