fluros or mh and hps

[stef666]

hey there,Im just starting to build my new terrarium.Size is 1200mm (4ft)long 900 (3ft) high and 600mm (2ft) deep.Im intending to grow mostly high temp dendrobiums (bigibbum and the like) plus some vandaceous orchids)
It will be heated of course.
My question is because of the height of the enlosure what would be more suitable fluros or should i get some metal halide and hps lights.Just seems as though with fluros they may be too far away from the plants?

Any thoughts would be appreciated
cheers