Red lens and Yellow Lens? each have benefits and each have a draw back too...
Read Dennis Kirk books...He starts off in the fox hunting book to tell you to use the red lens light on dark nights and the yellow on special nights..
Then he wrote his newer books..Like anything in calling things change...People who try all kinds of stuff determind...No...One should do this now...So Dennis started saying don't use red lens lights anymore use yellow all the time...
Red is good for night time thats for sure but most lights you can't see the entire fox...Only the eyes....You got to know how something acts to know what it is...Takes many people a long time to learn that...Yellow you can see the animal better then with a red lens...However all the eyes are white like diamonds... So you can't tell if it's a red fox, grey fox, coon, bobcat, or coyote by the coloration of the eyes... ME I like the red lens because I can tell if it's a red, grey, coon, bobcat, coyote, domestic cat, dog, or deer or other critter... Now you start mixing the two...Red lens to ID the eyes and the shooting light yellow or white and your causing your eyes to have a glare when it's time to shoot... See even at sea sailors...Use the red lights on the bridge of the ship at night to see... You start going to the white or yellow at see and you get all kinds of glare.
I would start to us the yellow more often then the red if it works the same as the red...As you know the red lens is your shield. If the yellow also shields you like the red is suppose to then you would be better to go totally YELLOW or EVEN WHITE. A direct hit of a white beam on a predator means he is gone. yellow too could scare a predator away if you hit it with the direct beam...AKA Light on a dowel rod or broom handle..
If your going red then go totally red...If your going yellow then go totally yellow. If your going to use white then go totally white...
See for safety sake...We do need a light to ID our animals...Then of course you need your shooting light... There are times when a ID light can serve as a shooting light too.
Red, Yellow, and white can be used but you have to know how to use them.