Implications of constant 28oC & 80% RH for Phal seedling development

[OzPhal]

Hi Folks,

I just wanted to get your thoughts on a setup that I currently have access to for some Phalaenopsis species seedlings and advanced seedlings. I've got access to a growth chamber and am wanting to encourage growth - what, in your thought, would be the implications of leaving the plants at a constant 28oC & 80%RH with an alternating on/off light cycle of 12hrs?

I've calculated the light intensity based on Light Intensity Measurement and approximated that it is around 1,345 lux or 125 foot candles... which, according to some information I've read, is too low for Phalaenopsis although it doesn't look it... holding my hand about a foot above the leaves there is very little shadow