Recently during a storm, I lost power to my whole house. For ~30-60 seconds after losing power, 3-4 CFL bulbs continued to glow faintly. The bulbs were on different circuits, and legs of the 120/240V residential electrical system. One of the bulbs was even part of a multi-bulb fixture, where the other bulbs in the fixture all turned off.
I suspected possible backfeeding. But I wouldn't expect single bulbs in multiple bulb fixtures to get power while the others did not, if this was caused by backfeeding.
What could have caused these bulbs to continue to glow after power was lost?