I had two regular bulb lamps before I got the Sky lamp in my tiny room! I only have one window and we never get sunlight in New England anyway— but as soon as I plugged in Sky, it was enough to brighten up the whole room from one corner of the room. 

My only complaint (which is probably my own fault) is that I was after the Brightech lamp that has different colors (cool white, warm, neutral etc)— my mother bought one and it is incredible. But the one I received is only warm light which is dimmable. Eventually my eyes adjusted to the warm light and it wasn’t so bad. But I would have liked to have the color feature option.

So, buyer beware, make sure you look over all the tech stuff thoroughly if you’re looking for a cool/warm/neutral changing lamp!