Paula - I hope your attic is heated because Amaryllis don't like temps much below 55 degrees. The key to dormancy is total dryness. Cooler temps and darkness are much less important.
Anytime after 8 weeks of dormancy, they can be watered thoroughly just once and that is usually enough to wake them up. While it is in bloom (which is all too brief), it won't require much light. Just let it do its thing and that was established long ago during the summer growth period and the fall dormancy.
