I hadn't had pre migraine zigzags for a long time, till I sat in my sister's dining room recently. Within minutes I was having visual symptoms. It happened two days in a row before I thought to look up at her chandelier and see those CFL bulbs. I hope that there will be leeway for those with a medical excuse for not using them. (Next time I went to visit sis, they were gone, no one in her house liked them!)