My original idea was to try and cram a LED, battery, and switch in there. Yeah, that wasn't ever going to happen. My second idea was to make it solar power because as we all know, everything is better with solar. (Yes, even puppies!)
In a nutshell what I ended up making was a little side box that had a solar panel, joule thief circuit, and a switch on it connected to the glass bulb. Oh yeah.... I threw in a simple dark detecting circuit as well. Just cuz.
A fun beginners project for anyone wanting to do some soldering.
I'm putting together some "Light Detecting Solar Circuit" kits on my gadget webpage, Brown Dog Gadgets. All the electronics you'd need to build one of these. Or, if you don't want to do the work I have some of these for sale on my site... with upgrades...
Step 1: What You Need
Hot Glue Gun
Helping Hand (Optional really)
Breadboard (Optional, but super handy.)
Wire - I used 22 Gage Insulated as well as some thick magnet wire. Anything will work.
5K ohm Resistor
1K ohm Resistor
1 Zenger Diode
3 White LEDs
A switch (I used a toggle because toggles are fun to play with...)
4.5V Solar Panel
AAA Battery Holder
AAA NiMh Battery (You could use a AA as well. I just used these for their size.)
Glass Lightbulb from Hobby Lobby
Little Plastic Bead Box that I picked up at Hobby Lobby as well. 6 Pack for $3.
A lot of these supplies can be mixed and matched. AA instead of AAA. Smaller Solar Panel. Different box. Ditch the dark detecting. Blah blah blah. You're all adult, make up your own mind.
Total Cost for parts: $5 or so. I had all these parts on hand to begin with.
Total Time: Less than one hour if you know what you're doing, two hours otherwise.