Step 1: Gather the parts
Here are all of the parts that you need.
Step 2: Breadboard the circuit (if you want to test it)
Construct the circuit according to the schematic shown on the previous step.
Note: Depending on the photo-cell used the 100K resistor value might need to be changed. A pot could be used to determine the optimal resistor value.
Step 3: Solder it together
The cap is used to hold the light in position. All of the parts will be connected to the cap. Three holes will have to be drilled in the top of the cap. Then solder the parts together according to the schematic shown on the previous step.
Step 4: Detailed Cap Construction - Prep. the Cap
There are two holes that are needed in the cap. One for the power and a second for the photo-cell. Since the photo-cell is large I simply drilled two holes side by side.
Step 5: Detailed Cap Construction - Solder Method Step 1
Trim both resistors to the length shown (it doesn't matter what end of the resistors are used). Solder both resistors to the red battery snap wire (positive).
The resistor values are represented by color bars, look here for pictires:
[http://alan-parekh.vstore.ca/product_info.php/cPath/12_13/products_id/52" target="_blank" 100K ohms Resistor]
[http://alan-parekh.vstore.ca/product_info.php/cPath/12_13/products_id/40" target="_blank" 470 ohms Resistor]
Step 6: Detailed Cap Construction - Solder Method Step 2
Solder the 470 ohm resistor to the anode of the LED (non flat side).
Step 7: Detailed Cap Construction - Solder Method Step 3
Connect cathode of LED (flat side) to the collector (C) of the transistor.
Step 8: Detailed Cap Construction - Solder Method Step 4