All fluorescent lamps contain mercury. You can manage your spent fluorescent lamps as universal wastes as long as you do not crush them. But once you crush them, they release mercury which is a hazardous waste and you must then manage the crushed lamps as hazardous wastes.
EPA Region 2 has just taken enforcement action against two recycling companies in New Jersey for failing to manage crushed fluorescent lamps as hazardous wastes.
For further guidance on management of fluorescent lamps, click here.