Why recycle? Used light bulbs may contain corrosive liquids, toxic or reactive metals and can contaminate our environment. Do your part to properly recycle with this cost-effective solution. Includes everything you needâ€”simply order, fill, seal and ship. Kit contains a UN-rated, DOT-approved 5-gallon pail for lamps, inner poly liner and tie, instructions, terms and conditions and prepaid shipping label. Also includes Proof of Purchase Serial Number and access to online certificates of recycling. Holds mixed lamps or 45-90 spiral compact fluorescent lamps.