Can anyone tell me what red filter to use as a under the lens safety light filter, with a Aristo V 54 lamp. I just upgraded to it. I've been using the red safety filter that comes with the Ilford Multigrade Filters. It works fine the Aristo W 55 and W 45 lamps but not at all with the V 45 lamp, I can't see any image on the easel. I use the safety filter alot when dodging and burning small areas.