bearded dragon tank size question

[tyson001]

Im looking at building a melamine enclosure over the school holidays to house two young beardies im looking at buying i have two panes of glass i got off my grampa that he had lying around there 5mm thick and 75cm long and 35cm high im looking two make the enclosure 150cm x 40cm x 50cm
my question is do you thing these sizes are ok for 2 beardies and for how long my main concern is the height?

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sorry didn't mean to double post don't know how to delete