Cmh rx7s,g8.5,g12 types a fire hazard?

Hey guys and girls,
I am getting ready to set up a wardrobe grow cab ,i want to have 2 flower chambers-1 chamber for 2 plants and the other for one plant-then a veg chamber along side the smaller flower chamber.

I really like the idea of cmh and they are cheap , so I ordered and have for starters- an osram powerball 70w g8.5 and a osram powertronic pt/fit ballast to suit.
I am still waiting on my g8.5 ceramic lamp socket.

Now I fear that I have made a bad choice , I have not done much safety research on the type of cmh lamp I will be using , and i'm now more aware that most the smaller type cmh lamps rx7,g8.5,g12 etc have a potential fire risk , due to not having the outer tube for protection as they are made for rated enclosed fixtures.

So if one of these bulbs exploded it would not be good , my setup will be in my room! And not sure my insurance covers fire's started in grow cabs.
Am I stressing too much about it?it could bring my plans unstuck for a while.
Any of you had these bulbs explode before ? Would they definitely start a fire if unenclosed ?
Someone please tell me it's fine haha
Cheers
 
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