Usually these power failures (about twice a month) occur when the weather outside is terrible and the light very low, leaving you in almost total darkness. This is no longer a problem since I fitted these Emergency Led lights turning on instantly.
This particular model, occasionally sold by Aldi stores but also available on the Web if you know where to look, turns out to be the most clever version of led-based power failure torch on the market: beside the obvious advantage of using leds, the Starlight 100 from Topcom is IP44 splash proof and features an induction charger, adding to the safety of use. The torch body contains standard AA rechargeable batteries.
When plugged to the wall in normal situation, it charges and serves as a night light with a single soft blue led. It turns on its 7 powerful white leds automatically when taken from the holder or when the power fails.Another good point is the block of 4 standard AA rechargeable batteries that can be easily replaced by unscrewing the lamp handle.