Eco Quest Fresh Air G4T5 Lamp

Here is the lamp notice the metal in front of the lamp this picture is taken from the back of the machine
In operation there is another piece of metal covering the lamp (Which serves as a air filter)

I found a perfectly working ECOQUEST Fresh Air machine and it has a G4T5 lamp in it. My question is I can see the blue glow from the front of the machine but It is blocked by a metal mesh filter is that still bad to look at? If it is I may replace the lamp with an F4T5 (The machine complains if I remove the starter or lamp) as I don't like the idea of me or someone else getting hurt from a UV lamp

Here is a link to the manual for the product (Adobe Acrobat PDF File)

Thanks