Hey Robert, We do indeed offer extension cords for our photocell and our timer & photocell combo timer. For the photocell w/ swivel mounts, you would use the photocell extension cord. For the timer & photocell combo, you would use the photocell extension kit. Wherever you intend to mount the photocell just be sure that it is in a spot which receives adequate sunlight during the day and remains mostly dark during the night.
Evan, can the "10ft Photocell Extension Kit" also be used with the VAC-Timer3? Wish to install your transformer on an inside wall w/ photocell on the exterior side.
The VAC-timer3 is designed for our Slim Line series of transformers which the photocells are built directly into so, the extension would not work for the timer3. The extensions are designed to be used with our clamp-connect and classic screw style transformers because the Slim Lines are more-so placed outdoors due to having the glass faceplates for the cordless photocell feature and easy visibility of the power light and timer settings. If you were adamant about installing your Slim Line inside of your garage or somewhere else indoors and keeping a dusk/dawn setting, one thing you could consider would be to use a Digital Timer directly on the outlet, plug the transformer into it, then bypass the built-in timer by leaving it set to on. A digital timer can be geographically programmed to the dusk/dawn times of your area; they are pretty easy to program and accurate as well.
No problem with lighting interfering with the VAC-timer3 in the Slimline. Exterior mounted and working perfectly. As noted elsewhere, ready to have you guys help with the lanai project. Everyone loves the results!