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I was able to light the included bulb, along with a fluorescent light bulb, and the fluorescent light bulbs on my workbench.
Assembly is mostly straightforward, but make sure the primary windings are not too close to the secondary, otherwise the secondary will arc to the primary, possibly damaging it. I had several arcs, but it does not seem to have damaged it (other than a black mark). I 3D-printed a small spacer to keep this from happening again.
The power supply is important. At first, I was using a 15V supply, but I seem to get better results with a 24V, 6A power supply.
Playing music through the arc works as advertised. Keep in mind that the volume level is very low, but you can indeed clearly hear the music being played in a quiet room.
Overall, I am very pleased, and this was well worth the money. My kids and I spent hours playing with it. In fact, I bought a second one so that I can experiment with it, without worrying about breaking my original one.
Pros:
* Great value for the price
* Fun to play with
Cons:
* Make sure you have a beefy enough power supply. I recommend 24V, 2.5 A minimum.
* Assembling the primary windings can be tricky -- ensure you have the correct number of turns, in the correct direction, and at a sufficient distance to prevent arcing, but not so far away to decrease coupling efficiency.
You can find the the 3D-printed primary coil spacer I designed on TinkerCad by searching for "Tesla Coil Winding v2".
