There are a couple of questions.

A general question, how much light does a Phalaenopsis need? Who knows, but outside unprotected they fry any time of year here at latitude 33S.

Which direction does your window face?

How many sunny days does MA get in winter?

"so nothing fancy" some of those cheap grocery store Phals are very nice.

I'm just north of Boston and don't use any supplemental light for Phalaenopsis at any time of the year. It will be fine assuming this is the sunniest spot you can give it. If you can put it outside in the summer (indirect light), it will be extra happy.

You can also use a floor lamp. I did that in NY over winter to finish Phals which were spiking when I brought them in. If your Phals are finished, I wouldn't worry about it.

Jane

I recommend LED daylight 100w spotlight bulbs (Sylvania),at least. Lowes has them. From mid November to mid January put lamp on timer for 11hrs ( from 7am to 8 pm, for example). One floor lamp will do the trick for both your phals. Keep plants away from frozen windows at least a foot.

One more. Phalaenopsis needs at least 1500 fc. Check Andy orchids website. He gives good light range for many orchids. Best references so far!

The window in the pic is where they sit, and the sun rises there so it's also the sunniest. The big one is spiking now, each are about 10" now. Thanks for the responses

Yes, plants will need additional light if they have spikes. So just get all spectrum daylight spot LED, at least one lamp and phalaenopsis will appreciate it!

I had good luck using CFL's in a floor lamp. Any supplemental light will help. I used an octopus floor lamp with CFL's. Worked great.

Jane

jane, can you please post a pic of that floor lamp? I'm looking for something like that right now.

I'm with suzabanana. My phals get zero supplementary light and are also in an east facing window, like the OP. In fact, I have them off to the side so they get no direct sun.

tj

Pat, these are what I used. I had a lot of plants but used the octopus floor lamps to finish the spikes. I used inexpensive CFL bulbs and the floor lamps were from Home Depot and Target.

Thanks for all the input guys. My big one is almost done spiking but the little one is still flowering. When would be a good time to cut that spike and have it grown another one?

What is a what is. CFL light

compact fluorescent light (bulb)

I bought the light and bulbs that Jane recommended. I'm in PA and it has made a huge difference in my orchids. Even though they are in a fairly bright window, this time of year I think they love the extra light and warmth. IMHO, the lights are what has given me success with my vandals and phals. My vanda is in bloom now, before I got the light she never bloomed for me.

Not to give Jane all the credit, shaved monkey suggests seaweed(Maxicrop) and that has also really helped my orchids flourish