Sorry, I should have been more informative in the description.
All Humvee 1/35 scale kits feature blackout lights on that particular position and, as far as I know, none of the Humvee kits actually include the IR light. However, IR lights come in other kits of modern US vehicles... Bradleys, M113s, etc. So, perhaps there are some IR lights in your spare box from these kits?
I know some modelers used IR lights from Tamiya Bradley for their Humvee builds. The same light can be found in Legend M113 conversions, some of their IDF conversions as well...
Mario