  Lunar impact flash (LIF) observations typically occur in R, I, or unfiltered
light, and are only possible during night, targeting the night side of a 10-60%
illumination Moon, while >10{\deg} above the observers horizon. This severely
limits the potential to observe, and therefore the number of lower occurrence,
high energy impacts observed is reduced. By shifting from the typically used
wavelengths to the J-Band Short-Wave Infrared, the greater spectral radiance
for the most common temperature (2750 K) of LIFs and darker skies at these
wavelengths enables LIF monitoring to occur during the daytime, and at greater
lunar illumination phases than currently possible. Using a 40.0 cm f/4.5
Newtonian reflector with Ninox 640SU camera and J-band filter, we observed
several stars and lunar nightside at various times to assess the theoretical
limits of the system. We then performed LIF observations during both day and
night to maximise the chances of observing a confirmed LIF to verify the
methods. We detected 61 >5{\sigma} events, from which 33 candidate LIF events
could not be discounted as false positives. One event was confirmed by
multi-frame detection, and by independent observers observing in visible light.
While this LIF was observed during the night, the observed signal can be used
to calculate the equivalent Signal-to-Noise ratio for a similar daytime event.
The threshold for daylight LIF detection was found to be between
Jmag=+3.4+-0.18 and Jmag=+5.6+-0.18 (Vmag=+4.5 and Vmag=+6.7 respectively at
2750 K). This represents an increase in opportunity to observe LIFs by almost
500%.
