This is a standard replacement flash tube for the Quantum T2 flash head. Most current, professional flash heads and monolights are equipped with user replaceable flashtubes that may simply be plugged into, and unplugged from their sockets. With proper handling, these flashtubes may last for tens of thousands of flashes under normal use.
I dropped my Quantum flash at a wedding and it would not flash--good thing I had a back up! This is my go-to flash for weddings and a must-have for my work. I was glad to find this Flashtube available when I started to research how to fix my Quantum. I ordered this and replaced the Flashtube, and it now works fine. Phew! I was happy not to have to buy a $1000 flash.
I have 3 quantum flash lights almost 10 years, Trio 7 years .i had to change one bulb 2 years ago and now I decided to have one spare.