Sete, the company sub-contracted by Paris to run the tower, has decided to cut the time bulbs run by half, with 400 to 200 hours per year.
Since January 1, 2000, every hour after dusk, the 20,000 bulbs twinkle brilliantly for ten minutes and is, indeed, a hit among tourists.
"It's above all a symbolic decision, as the cost savings are not enormous", the Telegraph quoted tourism deputy of Paris mayor Bertrand Delanoe as saying.
"But in terms of image, it shows that we are putting sustainable development into practice", Jean-Bertrand Bros told Journal du Dimanche.
The move comes in an effort to make the Eiffel tower and other monuments more environmentally friendly.
Tickets and documents in the tower are made of recycled paper, and management claims that all the electricity used comes from renewable sources.
It is also currently studying a plan to put solar panels on the roof of its restaurants.