In 1999, Princeton University switched to low-mercury fluorescent bulbs. Low-mercury bulbs can be identified by the green tip on the end of the bulb.
Mercury-containing bulbs are considered a Universal Waste when recycled. All components of fluorescent bulbs, including low-mercury bulbs, are recycled or reclaimed by a bulb recycling facility.
For all fluorescent bulbs, including low-mercury or green tip bulbs:
- Building Services and Special Facilities collect the bulbs into cardboard shipping containers that are labeled "Universal Waste" and sealed.
- Filled boxes of bulbs are stored by Building Services in a holding area until transported to the contracted recycling facility.