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UV Refrigerant Dye - are the yellwo glasses necessary?

7.1K views 3 replies 4 participants last post by  athos76  
#1 ·
I have a low charge so I might pick up a can of 134a with dye. I already have a black light. Are the glasses necessary, or are they a gimmick? Thanks.
 
#4 ·
tjkj2002 said:
The yellow glasses make the smallest leak and all other leaks stand out much better then just using the UV light itself.
They help filter out the reflected uv light from other areas so the dye sticks out. If you can search in complete darkness (or close to it) it's better