Sad Lamp- how long?

[granadagirl]

Hi
If you have a sad lamp, how long do you have it on for?

I think they recommend 10-30 mins a day. I have mine on much longer though as I forget. Don't think it does harm.

Depending on how powerful it is you need to build up. I start each autumn with 5-10 minutes a day, then build up to about 30 minutes, if I get the chance. It's tricky though as I need to do it early morning, otherwise I'm awake all night!

I've never heard of this but just gave it a quick google... what is the difference between a lamp and a sad lamp? Beneficial because you can set them to automatically turn on when you want or do they display a different kind of light or something?