I have not used a 65 watt grow bulb like you describe, but I am guessing that it might be OK for low light orchids (like your phal), but not medium-high ones like the catt family (epicatt, Bc and encyclia). And vandas are pretty high-light orchids. Here's a commonly used test:
Put your hand six inches above the leaves of your orchid plant in the light. If you see a sharp shadow casting on the plant, then its failrly strong light. A shadow with softer edges means there is medium light and a very diffuse shadow means low light.
I hope this is helpful!