They're good for a smaller space (4' tall, for example). If you do a taller space, you have to make a fixture and use the 14-18w versions (fewer bulbs). It's too much work hanging bulbs in a 4x4x7' tall space. But, in a 2x4x4' tall space, it's not bad using a lot of 8-10w bulbs (more bulbs, more...