The only time a consumer may be exposed to mercury is if the glass of the lamp is cracked or broken. If this happens, the following rules help to minimize the exposure:
1. Don't panic! Remember that a fluorescent lamp contains only a very small amount of mercury.
2. If the lamp was broken in a luminaire, make sure to disconnect the power to avoid the risk of electric shock.
3. Since mercury distributes at ground level, children should leave the room.
4. Open the windows and leave the room for at least 15 minutes. If possible, allow an air draft through the room.
5. To protect yourself from cuts with glass shards, gloves should be used whenever available.
6. After ventilation, gather large glass pieces in a sealed container and close it tightly.
7. You should bring the container with the bulb remains to the next collection point for waste lamps. If you have to store them in the meantime, please do so outdoors, if possible.
1. Collect smaller glass pieces, for example with a stiff cardboard.
2. Thoroughly wipe the surface at least two times with disposable household towels.
1. It is recommended to vacuum the carpet for at least 5 minutes with open windows. Afterwards, ventilate the room for 15 minutes and repeat procedure at least two times.
2. If possible, clean and air carpet outdoors (at least one day).
3. Diligently wipe nozzle and immediately remove bag or thoroughly clean dust container. Leave vacuum cleaner running outdoors for at least 15 minutes.
4. All used materials (gloves, pieces of cardboard, household towels, vacuum cleaner bag and dust from bagless vacuum cleaner) can be disposed of as household waste, but should immediately be taken out of the living area.
5. The room should be ventilated after all lamp remains have been removed.
In order to ensure that our clean-up instructions are correct, LEDVANCE chose a scientific approach to this topic. The Environment, Health and Safety department conducted an intensive study measuring the mercury contamination in a room in which a fluorescent lamp was broken and several alternatives for cleaning up were analyzed:
To test the actual concentration of mercury in a room in which a fluorescent lamp was broken, the following test was conducted. The lamp in question was a L58W/640 with a mercury content of approximately 5 mg in liquid form. This is considerably more mercury than contained in modern compact fluorescent lamps.
A fluorescent lamp was fractured in a closed room. After six minutes, the shards were removed and the room was ventilated by opening the door and window. The mercury concentration in the air was recorded continually.
Lamp type: L58W / 640
Room temperature: 22 °C
Room size: 15 m², 2.30 m high = 35 m³
Location of sensor: 0,5 m above broken lamp
Sensor equipment: Mercury vapor monitor Hg-MAK 1200
The mercury from the broken lamp quickly leads to a concentration reaching a maximum of 25 µg /m³. The discontinuous form of the data can be attributed to the sensitivity of the measuring equipment, and the movement of air. Similarly, two peaks after the window is opened are due to the increased movement of air. Only 3.5 minutes after the pieces are removed and the room is ventilated, the mercury concentration drops to nearly zero. The concentration over the course of the experiment is considerably below the permissible occupational threshold values  for mercury vapor.
 Threshold value 80 μg/m³ for 30 minutes according to TRGS 900 - published by the German Federal Ministry of Labor and Social Affairs 2012 – and threshold value 100 μg/m³ according to the American OSHA PEL (Occupational Safety and Health Administration / Permissible Exposure Limit).
A note on the methods for CFL disposals: A wide variety of guidelines can be found on the internet published by distinguished institutions, some at odds with each other. It was this confusion that led us to conduct the study mentioned above. The results of the scientific study confirmed the above described rules, which are a slightly amended version of the Energy Star Guidelines. Nevertheless, you can read these and other guidelines yourself: