Review on Stay Lit in Emergencies: Rechargeable LED Bulbs with 1500mAh Battery Backup - 15W, 80W Equivalent - Ideal for Power Outages at Home by Maribel Gilbe

Bought for parents. My dad wasn't very happy when he first opened them (as a Father's Day gift) but they've come in handy ever since! You have to be strategic about where you place your charging bulbs. My parents have one in a lamp that stays on all the time, but the problem is that the backup charge runs out before they get home in the evening if the power goes out a few hours before. The other bulb is perfect for a floor lamp that is turned on and off frequently. I love that the base has a hook to hang it on. My nephew took a bath by the light of one of these bulbs and you didn't realize the power went out!