Oh interesting! That's actually an excellent idea! Do they use such green windows on photocontrols with cadmium-sulfide eye?

I have one of these too. These are one of the best PCs out there IMO. They're very light sensitive and reliable. The window is actually clear with a green shade in front of the eye.

Vince, Sun-Tech now uses the green windows in all of their electronic photocontrols. I asked them if they can still make photocontrols with clear windows and they said no. The green window is now standard.
streetlight98, Sun-Tech used to use the green filters behind the window. But now they actually make the window itself out of green tinted plastic. I opened one up and took the window out. It actually is green.

I started to notice that the photocells we were getting in at work had the green windows. My LEOTEK LED streetlight I have installed in my back yard has one.

Antstar85, I think Sun-Tech told me they changed the windows in the beginning of 2011.

I personally like DTL better, but these are still good PCs.

I like DTL too. But DTL's are made in China. Sun-Tech is made in the U.S. I cant decide whats better. China made? or U.S. made?

I look for quality over where they are made personally.

I try to buy local rather than outsourced. I think of it this way: Do you want to give other countries your money or spend it on local companies? If yuo buy local, you keep the money circulating in your home country rather and giving it all to other countries. I like FP better becuase my DTL PCs are not sensitive to light at all and both are new. My FP PC is much more sensitive which i like better about it.

I have a DTL from 2005 that still works.

It depends on what options you order, here they use DTL PCs and they have the 8 foot candle setting, they come on super early, when they are not yet needed, for example a light on my grandmothers street is on right now, it has one of those PCs, all the others have FP PCs and they wont come on for another half hour, it all depends on the options. About buying local vs international, sure I would rather but local but in reality most stuff comes from China these days, if it is going to be much cheaper for me to buy it from elsewhere, and I can get the same or better quality, I will something made somewhere else. DTL is still an American company anyways. And from 2005? I sure hope that still works, there is no reason it wouldn't so I don't know why that would be in any way remarkable.

Here it's already pitch dark. It's dark by 5pm here. you guys are lucky becuase you're closer to the end of the time zone so it gets darker later and lighter later. The PCs i have are from 2006 from Darren. ( the black ones)

Sun-Tech does make their electronic photocontrols in the U.S. But they get their thermal ones from china. I ordered a thermal FP PC before just to see if their better than thermal PCs at lowes. But their not. It looked like it was made by Longjoin with the name FP molded into the cover. And yes DTL is an american company. They are actually an Acuity Brands company, along with AEL, Lithonia, Holophane, and other brands. But they make the DTLs in China though. As far as DTL being better than Sun-Tech, im not sure about that. Many times i have had a DTL PC, and i noticed some components on the circuit boards of some of them were missing, broken off, or look like they were purposely cut off at the factory. But i don't know what the deal is with that.

Aren't the Sun-Techs made right in Raynham, Massachusetts? Mine says that on top, but that might just be the corporate location... The sticker on the bottom of mine reads:
PE120-1.5-PTW
105-130V, 50-60HZ
1000W, 1800VA
D0010159 8/2010

Sun-Tech makes their electronic photocontrols in the USA. They get their thermal photocontrols from China. Probably from Longjoin.

I've never liked thermal PCs anyways. To unpredictable and take too long to respond to light IMO.