If you're referring to the possibility of a spark causing a fire a la Apollo 1, the LM oxygen pressure was less than 5 psi, which is only a bit higher than the ~3 psi partial pressure you're sitting in right now. Assuming that there was anything flammable in the LM, a flame would burn hotter & brighter, but it would be nothing like the inferno of Apollo 1, which was pressurized with 16 psi of pure oxygen.

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"Transport of the mails, transport of the human voice, transport of flickering pictures - in this century, as in others, our highest accomplishments still have the single aim of bringing men together." St. Exupery