Sure. I use one. 10,000 Lux, 3 feet from my pillow, on a timer. Synthetic sunrise, only instantaneous, which is admittedly sub-optimal. For me, it certainly helps me get going in the morning.

In my experience, I tend to like the natural spectrum lights better. Mine are around 5000 K to 6000 K. I have several bright (1600 lumens) fluorescent bulbs which I use all day. Some say the spectrum is not very important to help with SAD, that it is merely the brightness which matters. For me, it is just personal preference to use the bright white bulbs.

About an hour before I plan to go to sleep, I turn off the natural spectrum lights and use some dimmer incandescent or halogen bulbs, which have the soft white spectrum many people are used to. Supposedly the dimness and lower amounts of blue in these lights lead to better sleep. I'm not sure if it's true or whether it's just the dimness which makes it easier to sleep.

They work. You are supposed to run them at noon but I run them during breakfast and then it's easy to give the kids an early bedtime.

There's a lot of anecdotal evidence.

The evidence from actual trials is at best weak.

There are many lights of this variety. They are classed as SAD lamps/bulbs.