Eco-bulbs 'a health hazard for babies and pregnant women due to mercury inside'

Last updated at 10:26 AM on 23rd December 2010

Energy-saving light bulbs were at the centre of a fresh health scare last night after researchers claimed they can release potentially harmful amounts of mercury if broken.

Levels of toxic vapour around smashed eco-bulbs were up to 20 times higher than the safe guideline limit for an indoor area, the study said.

It added that broken bulbs posed a potential health risk to pregnant women, babies and small children.

From a normal light bulb to the energy saving model. There are fears that broken eco-bulbs pose a health risk 

The concerns surround ‘compact fluorescent lamps’ (CFLs), the most common type of eco-bulb in Britain, which are mini-versions of the strip lights found in offices.

The European Union is phasing out the traditional ‘incandescent bulbs’ used for more than 120 years and is forcing people to switch to low-energy alternatives to meet its climate change targets.

A CFL uses a fifth of the energy of a conventional bulb and can save £7 a year in bills. However, critics complain that CFLs’ light is harsh and flickery. Medical charities say they can trigger epileptic fits, migraines and skin rashes and have called for an ‘opt out’ for vulnerable people.

Incandescent bulbs do not contain mercury, along with other variants of energy-saving lights, such as LEDs and halogen bulbs. The study, for Germany’s Federal Environment Agency, tested a ‘worst case’ scenario using two CFLs, one containing 2 milligrams of mercury and the other 5 milligrams. Neither lamp had a protective casing and both were broken when hot.


Scientists at the Fraunhofer Wilhelm Klauditz Institute found that they released around 7 micrograms (there are 1,000 micrograms in a milligram) per cubic metre of air.The official guideline limit is 0.35 micrograms per cubic metre.

Federal Environment Agency president Jochen Flasbarth said: ‘The presence of mercury is the downside to energy-saving lamps. We need a lamp technology that can prevent mercury pollution soon.

‘The positive and necessary energy savings of up to 80 per cent as compared with light bulbs must go hand in hand with a safe product that poses no risks to health.’
German government agency’s researchers were alarmed to discover that some bulbs had no protective cover and broke when hot.
High levels of mercury were measured at floor level up to five hours after the bulbs failed.


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