Help My Ikelite DS-125

I just purchased a new Ikelite DS 125,

When I see carefully at the flash tube,

it is not flawless glass, there some glass like

melted like shown in the photo here.

I am afraid this melted glass could break the flash tube

it self.

Does your DS 125 has this mark also ?

Will it getting bigger ?

Thanks,

Regards,

The flash tube is made out of blown glass. What you are looking at is a nipple that is left from the process of the glass being blown. It is not anything to worry about. It will not get bigger. The flash tube in all DS-125s has it.