What photocells are preferred by utility companies?

[gramirez2012]

Just curious if anyone knows what type of photocells utilities use most. Thermal, relay, electronic? Instant or Time delay? Is there a most-popular brand? Around here ComEd uses black photocells, but I'm not sure what kind they are.

[vaporeyes]

All the utilities around here (Seattle, Washington and vicinity) use the blue multi-volt photocontrols for everything now. They used to be Fisher-Pierce but there may be some other brands such as DTL being used now. The old ones were time-delay relay types, but I believe the new ones are instant and probably electronic, though I haven't seen one up close. The ones used on the new LED fixtures come on very late (closer to total darkness) likely for energy-saving purposes.

[mercuryvaporrocks]

Most utility companies in my area use black colored photocells.

[Mike]

Well, my utility/electric comany here, National-Grid Rhode Island, used to use brown PCs but now they use gray Fisher Peirce Sun Tech photocells.

[Form109]

i haven't really paid attention to it.

[joe_347V]

Haven't really checked to be honest, but it's seems the grey PCs are pretty common here.

[Jace the Gull]

In my area for BGE it's black for 120 volts, blue for higher volts, and the grey ones were the older ones....

For Delmarva Power it's brown

MD state uses blue or the intermatic ones (with the numbers around it)

[Lil'Cinnamon]

Xcel energy LOVES to use the Fisher Pierce Sun-Tech Photocells, Navy Blue in color. I see them everywhere. Most of the photocells I have are those kind because... Yeah you understand that. xD

I think Colorado State likes to use brown ones... And Colorado Springs likes to use the same, the Fisher Pierce Sun-Tech photocells, but they are Just normal blue, not dark blue.