OK, so TM doesn't always lead to more "enlightenment" according to this
study. This is a GOOD thing, in this context.

http://www.liebertonline.com/doi/abs/10.1089/acm.2006.12.31

Journal of Alternative and Complementary Medicine
Anatomic Characterization of Human Ultra-Weak Photon Emission in
Practitioners of Transcendental Meditation and Control Subjects
Jan 2006, Vol. 12, No. 1: 31-38

Eduard P.A. Van Wijk, Ph.D.
International Institute of Biophysics, Neuss, Germany.
Heike Koch, M.A.
International Institute of Biophysics, Neuss, Germany.
Saskia Bosman, Ph.D.
International Institute of Biophysics, Neuss, Germany.
Roeland Van Wijk, Ph.D.
International Institute of Biophysics, Neuss, Germany.
Faculty of Biology, Utrecht University, Utrecht, The Netherlands.

Background: Research on human ultra-weak photon emission (UPE, biophoton
emission) has raised the question whether a typical human emission anatomic
percentage distribution pattern exists in addition to individual subject
overall anatomic summation intensity differences. The lowest UPE intensities
were observed in two subjects who regularly meditate. Spectral analysis of
human UPE has suggested that ultra-weak emission is probably, at least in
part, a reflection of free radical reactions in a living system. It has been
documented that various physiologic and biochemical shifts follow the
long-term practice of meditation and it is inferred that meditation may
impact free radical activity.

Objective: To systematically quantify, in subjects with long-term
transcendental meditation (TM) experience and subjects without this
experience, the UPE emission of the anterior torso, head and neck plus the
hands in an attempt to document the differences by the two groups.

Subjects: Subjects were 20 men reported to be healthy and nonsmokers. Each
of the subjects in the meditation group had practiced TM twice daily for at
least the past 10 years.

Methods: UPE in 20 subjects was recorded in a dark room using a highly
sensitive, cooled photomultiplier system designed for manipulation in three
directions. The protocol for multisite registration of spontaneous emission
includes recording of 12 anatomic locations of anterior torso, head, and
hands.

Results: Data demonstrate emission intensities that are lower in TM
practitioners as compared to control subjects. The percent contribution of
emission from most anatomic locations was not significantly different for TM
practitioners and control subjects. Exceptions are the contributions of
throat and palm.

Conclusion: In subjects with long-term TM experience, the UPE emission is
different from control subjects. Data support the hypothesis that free
radical reactions can be influenced by TM.