A light bulb that runs on solar power? Not quite… the Bulb Solar Lamp is more of a bulb-shaped nightlight that glows in the dark. Not people who would tolerate their idea being thwarted by the simple fact that anything shaped like a light bulb would have trouble standing up, the lamp's designers encased the Bulb Solar Lamp in a block of solid transparent material. You've got to respect such tenacity, especially since it lets you put the thing pretty much anywhere in your house.
The $48 price is pretty ridic, but for a green-themed novelty gift you could do a lot worse. The site says it'll be out of stock for a few weeks, so you unfortunately won't be able to get one in time for mom. It's more of a dad gift anyway.