A recent blood test shows I'm very deficient in Vitamin D, despite supplementing for a long time. I'm housebound except maybe ten minutes to and from a cafe every day or other day. I try to get more sunlight exposure when it's sunny but as anyone looking out the window in the UK right now at this, the height of 'summer', we've not had much summer sun in the last few years. I also don't have a garden so can't go out with few clothes on and sunbathe. So, I'm thinking - lamp! Is there such a thing as a lamp with a suitable spectrum for boosting Vitamin D? I don't want to buy a sunbed!