According to The International Association for the Study of Dreams--

A lucid dream is when you know you are dreaming.

In an OBE, you DON'T believe it's a dream--you believe (at least at the time) that it is somehow real.

In short, it can't be a lucid dream if you don't think it's a dream, because it doesn't fit the definition.

Whether or not you believe in OBEs, this is what the experts on dreaming agree on.

You don't have to believe in astral planes and all that crap to have an OBE. That's a misconception. An OBE is just an experience. What you choose to believe it was after the fact is totally up to you, and nobody else can tell you if you are right or wrong.

But don't take my word for it. The International Association for the Study of Dreams has this in their FAQ:

Q. Do OBEs, NDEs and AAEs just seem different types of lucid dreams?
A. No. First off, even a minimal definition of a lucid dream requires that you realize that you dream during the experience. OBEs, NDEs, and AAEs fail this test because people who have experienced them usually vehemently deny that they could have possibly dreamed it. They did not believe that they dreamed during the experience, and often continue to deny this possibility even after subjected to strong social pressure to do so. Many have reported losing their fear of death after having OBEs and NDEs, or have acquired new and potent fears after AAEs. No one that I know of has reported on lucid dreams having these particular profound effects on those who have experienced them. (see the Appendix in this FAQ). Of course, you can have dreams of OBEs (or NDEs or AAEs) just as you have dreams of anything else. The inexperienced or obtuse often confuse dreams of OBEs with OBEs, thereby confusing the issue. (Also, for more information see the Appendix at the end of this FAQ titled "A Phenomenological Account of Out of Body Experiences")

For the full FAQ on "Paranormal dreams," go here:

http://asdreams.org/telepathy/faq_paranormal.htm