Just my opinion, but using a sufficiently strong white light will have a much more negative effect on an attacker than on you.
But I think your concern is valid. What I did was experiment with different light strengths in my home after my eyes had adjusted to the normal level of darkness (there's always some ambient light in my home). I did this to check for the effect of glare that comes off the walls as well as how quickly my eyes can recover their night vision. For me, I found that about 200 lumens give me sufficient light to identify a potential threat, doesn't produce excessive glare, and allows for quick recovery for my night vision (but will be disorienting to anyone the light is aimed at). While I don't use a WML, I do keep a flashlight on my nightstand. I use a 25+ year-old Surefire 6P with a Malkoff 200 lumen warm flood LED lamp assembly. I find it to be an excellent tool for the purpose. I also have my EDC light, a Nitecore MT1A, handy by my computer (when it's not in my pocket), and it has 180 lumens.
I also have LED night lights installed. While not particularly bright, they do produce enough ambient light to see if anybody's in my home. While I don't live in Fort Knox, I have layered my security such that anyone attempting to get inside will have to use a lot of force, taking time and making a lot of noise in the process, making it pretty obvious that anyone able to get through that is a threat while (hopefully) giving me time to wake up, grab my gun, and call 911.
If you still want to try a red light, you may be able to find a filter that mounts on an existing light. I haven't followed the Surefire product line for quite some time now, but at one time they sold different colored filters. In a previous job I had collateral duty as a first responder, and part of that job was cleaning up any blood. I had a blue filter on my 6P to make it easier to see. I do know they made a red filter, too. However, I don't know how durable they'd be on a WML. On the other hand, trying a mountable filter first may be a relatively inexpensive way to see if it would work for you before investing in a purpose-built red light.
Hope that helps.