Cheap household bulbs are often built without an isolated driver. Basically, the low voltage side isn't properly and safely separated from the high voltage side and physically touching the low voltage side can with a bit of bad luck be the same thing as touching the high voltage side.
Here's a short read for anyone interested:
With the rising awareness of energy saving and the significantly dropping cost of LED fixtures, LED fixtures have become more and more prevalent.
www.meanwell-web.com
It's great that it ended well for you
Let's collectively keep informing the rest of the community too.
Far red and UV wavelengths are made with different diodes than regular "white" diodes. You can DIY your way around it somewhat. UV can be supplied with reptile bulbs, for example.
If you're interested in a smaller 36w E27 bulb with bare diodes that reasonably priced, our LEDTonic Q2 is a pretty awesome alternative.
PS. it has an isolated driver and operates at 150 lm/w (2.13 µmol/J)