Repti Therm Zoo Med for 12x12x12 Exo Terra enclosure

[GRABibus]

Hi,
I have a male albino horned frog and I would like to transfer him in my 12x12x12 Exo Terra glass terrarium.
To heat this terrarium, I wondered if a Repti Therm Zoo Med 16W (8" x 12") can be "sticked" on one side :

ReptiTherm® U.T.H.

Did someone already use this heating pad for this kind of terrarium ?
Do you think that the required 78.8F to 80.6F during the day will be reached easily with a room at 68F ?

Thank you in advance.

PS: I just saw that the plug of this product is not as European plugs and so cannot be plugged in european sockets....? lol