I have been growing native hardy orchids to UK for some years. Mostly Dactylorhiza & Cypridium. I have started playing with NOID Paphilopedium & Phalanopsis indoors with a view to moving on to species once I have got the basics right. Todate this has all been using an east facing window. This seems to suit the Paph. but so far limited success with Phal. which seem to sulk. Phal. leaves are dark so it may be a light issue? Temperatures are about right. It could be humidity? Q. How do you measure light? Are light meters worth a try and if so what would you recommend. Q. How do you measure humidity? Thanks in advance.