How to Identify and Recycle Different Types of Fluorescent Lamps

Fluorescent lamps come in a wide variety of shapes, sizes, and technologies. Linear fluorescent tubes are classified by diameter in eighths of an inch: T12 tubes (1.5 inches) were the standard for decades; T8 tubes (1 inch) replaced them as efficiency standards tightened; T5 tubes (0.625 inch) serve high-output applications. Lengths range from 2 feet to 8 feet, with 4-foot being most common. U-shaped tubes and circline lamps are also linear fluorescents and are recycled identically. All contain mercury and require proper recycling.

Compact fluorescent lamps (CFLs) — the spiral or folded lamps that replaced incandescent bulbs — contain less mercury than linear tubes but are still subject to Universal Waste regulations for commercial generators. Do not mix CFLs with linear tubes in the same shipping container, as different geometries increase breakage risk during packing.

HID lamps — metal halide, high-pressure sodium, mercury vapor, and low-pressure sodium — are used in industrial, outdoor, and high-bay applications. They are larger, heavier, and have different packaging requirements than fluorescent tubes. Chicago Lamp Recycling accepts all HID types alongside standard fluorescents. When preparing a mixed shipment, call 847-241-8388 so we can advise on the correct containers and confirm pricing for each lamp category.