I use a SAD lamp that it better for people with bipolar than full-spectrum light. It is blue light only (which is what we need) and it tends to cause less mania. It's also adjustable in intensity which helps a lot; I need it to be quite low to be effective without being too stimulating. It's also a bit faster; I think broad sprectrum light is supposed to be 30 minutes/day and this is 15. It is not super cheap but is LED so it should last so long that the cost per year is very minimal. It's made by Phillips and I ordered it online. I can't use it every year, if I'm hypomanic or manic at all it will just make me manic or mixed, but years like this one it helps. I start at just 5 minutes at a very low setting and gradually go up.