Red. . . .will work just fine. Deer live in a Black and white world. . .they don't see red well, that's why lots of states require you to wear blaze orange, it shows up real well for us that see in color but to a Deer it is just another shade of grey. I have used a 2 million candle power spot light in my back yard and with a red filter it does not spook Deer as bad as no filter. But this is a REAL bright light. A little red LED head lamp won't bug them a bit. I use mine when ever i need light coming or going in the dark.