This hardy, decorative houseplant, formerly called a Pleomele reflexa, is native to Madigascar, Mauritius, and other islands of the Indian Ocean. The Dracaena reflexa, Song of India, has yellow stripes on short, narrow, pointed green leaves that are spirally arranged on the stem and tufted at the branch ends. The usual Dracaena reflexa has solid green leaves. This is a slow growing plant that can be used as a table plant, bush, or short tree.
Dracaena plants are considered to be slightly poisonous, especially to dogs and cats. Read more about common houseplants that are poisonous in my book Don’t Feed Me to Your Cat: A Guide to Poisonous Houseplants.
The spots you describe sound like a disease called leaf spot. The first thing to do is keep the leaves totally dry and reduce the humidity around your reflexa. Then remove all diseased leaves and any dead plant material that may be lying on the soil. If the disease persists, you’ll need to spray the plant with Neem Oil or a Fungicide.
You can move it outside if you are careful about the weather conditions. Be careful not to let it get any direct sun. Direct sun will burn the leaves and ruin the plant’s appearance. Reflexas like to be very warm, so do not move them outside until the evening temperatures are not going below 65 degrees. Cold air and drafts really cause the plant to deteriorate.
Although some dracaenas, like the janet craig, can do well in low light; the dracaena reflexa, especially the variegated variety, really needs bright indirect light to look its best. You need to move your plant to a location where it will get better light if you want the leaves to look their best.