Greenfield DPPS Weatherproof Electrical, Dusk to Dawn Photosensor
Review by P. Scott Pope "Scott Pope" : Works as Advertised, Could Use Better Documentation

This photosensor was purchased to supplant a timer on a residential post lamp. It was easy to install by splicing into an outdoor electrical wire running from a house to a subterranean path underneath the landscape. Simple twist wire connectors enabled a simple but crude splice in the short length of the electrical wire that is above ground. However, I am not entirely confident the installation will be fully weather resistant. The plastic enclosure of the photo sensor is fully sealed and is very solid. However, it appears to be designed to fit into a weatherproof housing of another product as it is connected with basic stranded wires.

In order to avoid any electrical arcing during a rainstorm, I purchased the King Safety Products 62225 waterproof wire connectors (see review) but they turned out to be too large for the available wire lengths so I had to use conventional indoor wire connectors. It would be nice if the photosensor had screw wire terminals with waterproof seals to fully isolate all of the bare electrical connections instead of having wires.

Another gripe about this product is the minimal documentation. For example, the enclosed literature doesn't mention the time delay employed by the switch, which appears to be about three minutes. Additionally, it isn't clear exactly how the sensor should be positioned. In other words, there was no guidance on how much shade it could tolerate and still remain closed.

Despite the shortcomings, the Greenfield Dusk to Dawn photosensor is a great bargain. It is a superior alternative to electronic timers for controlling outdoor lighting as it doesn't require any adjustment as the seasons change. Given its low cost, easy installation, and rugged enclosure, I would recommend it despite the minimal documentation.

Pros
Works as advertised
Simple to install
Inexpensive

Cons
Minimal documentation
Not ideal for a fully exposed outdoor installation

Greenfield DPPS Weatherproof Electrical, Dusk to Dawn Photosensor
Review by Sargon : IT WORKS !

You don't get a diagram but if you Google a schematic for a Motion Detector,it's the same exact wiring.

You only have to wire up three sets of wires (seven wires). You have a red, black, and white wire with this device. You have black and white on both your supply voltage(AC 120) and load wires(mark them as such if necessary, and it doesn't matter which ones is which as AC alternates, hence the name).
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HOW TO WIRE A DUSK TO DAWN PHOTOSENSOR:

Connect all the white wires together and cap the wires. (already you are half done) Connect the black of the Photosensor to the black of the supply voltage wires. Connect the Red Wire of the Photosensor to the black of the load (usually a lamp).
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Simple. Don't forget there is a 5 min. delay so be patient. If you followed the above directions, it will work. I don't write reviews for gadgets that often but this seemed like the appropriate time. I hope it helps someone.