It depends on what you mean by low. I haven't grown L. anceps in conditions like yours, but Baker's temperature data indicates that January nights average 50F in natural habitat. If 50F is average then about half the nights are colder, perhaps significantly, and L. anceps is known to survive at least short term exposure to 32F. Unless your night temperatures are falling below 40F on a regular basis, or ever below 32F, then you should be fine. Perhaps it doesn't LIKE temperatures much below 50F, but they are healthy and normal for the species, and keeping it much warmer might not be as healthy and normal. The coldest temps in natural habitat also come at the driest time of year, so lots of moisture at those times should probably be avoided.