Lenses disperse light to reduce glare and protect bulbs from damage. Cut to size using a band saw or shears.

Solid lenses keep bulbs hidden and distribute light evenly. Lenses with a prismatic or cracked ice pattern distribute light better than smooth lenses.

Egg crate and parabolic lenses have an open construction to allow more light through than solid lenses as well as more air circulation to cool bulbs. Parabolic lenses are reflective to direct light downward, which reduces glare.

Polystyrene lenses are the most economical, but they may yellow over time. Acrylic lenses won't turn yellow over time. Polycarbonate lenses are more impact-resistant than acrylic lenses, but they may yellow over time. Aluminum lenses withstand higher temperatures than plastic lenses.