"There is a common misconception that energy saving is always equivalent to environmental protection. Compared with electromagnetic ballasts, electronic ballasts have a much shorter lifetime and are not recyclable."
Source: Chung, H.S.-H., N.-M. Ho, W. Yan, P.W. Tam, and S.Y. Hui. 2007. ‘Comparison of Dimmable Electromagnetic and Electronic Ballast Systems - An Assessment on Energy Efficiency and Lifetime’. IEEE Transactions on Industrial Electronics 54 (6): 3145–54. doi:10.1109/TIE.2007.907037.