The sale of standard 'pear-shaped' halogen light bulbs in the European Union will be formally phased out from midnight tonight.
From tomorrow, retail outlets across the 28 member States can only order L.E.D. bulbs, which are more energy efficient.
Household L.E.D. bulbs on average cost €2 per year to run and can last up to 20 years.
The halogen bulb ban was first floated in 2009, but the phasing-out was pushed back until now.
Grace Bolton of the EU office in Dublin says this is great news for Irish home owners and for the environment.
"Since this phase out was announced, L.E.D bulbs have become far more affordable", she said.
L.E.D bulbs can last for up to twenty years, and it's estimated that, compared to using a halogen bulb, they can save consumers around €150 per bulb.