|Since CFLs use much less energy than ILs, a phase-out of ILs would result in less CO2 being emitted into the atmosphere. Exchanging ILs for efficient CFLs on a global scale would achieve annual CO2 reductions of 246 Mt (million tons). By way of comparison, this is greater than then combined yearly CO2 emissions of the Netherlands and Portugal.
To get a sense of the magnitude of these reductions, let us compare these achievable efficient lighting savings in CO2 emissions, with the emissions of vehicles: 246 Mt of CO2 per year equals to the emissions of 61 million mid size cars. In terms of CO2 reduction potentials among the main two groups of UNFCCC signatories, Annex I countries would stand to gain around 60% of these energy savings and Non-Annex I countries around 40%.