Can lack of sun (even during summer) cause seasonal depression?

I've heard of seasonal depression during the winter time where people have a lack of sunlight, but I have a question --

It's summer time and it's always sunny here, but I'm always inside. I work from home and am almost never outside. I do go for walks at night time for exercise, but by that time it is already dark outside, so still no sun.

Can this cause a form of seasonal depression? (because technically my body is getting very little light). I have been feeling a bit down lately, and I feel that this might be the cause of it because I really have no other reason to feel down. Life is good!

yes seasonal depression is possible, but the biggest before that would be vitamin D deficiency. you may get enough but without the uva/b rays- your body does not convert D properly and it gives the same tired heavy sluggish depression

Yes, this can happen. What i would do is maybe while working open a window and let some light in. Or go somewhere for lunch that you can sit outside. This happens to me in the winter because during the winter i am a home-body.