Cool Can You See Ringworm With A Black Light References. Although blacklights can have no filter, the more widely recognized version is a uva bulb with dark blue filter. The black light lamp can be an important tool in determining ringworm in cats, but the wood’s lamp is not a 100% conclusive way to diagnose it.

The black light lamp can be an important tool in determining ringworm in cats, but the wood’s lamp is not a 100% conclusive way to diagnose it. Photos by lauren mullen, cawa/san francisco spca Your doctor will usually diagnose ringworm by first doing a physical examination of your skin.