I achieved this milestone on the in-door bike at the gym today! It only took a couple years and sadly, I’m still overweight! If I remember my Chemistry, I have produced enough energy to raise 100,000 grams of water 1° C or 1 gram of water 100,000° C, probably would be plasma long before this temperature.
I did look up the joule thing. The easiest calculation I found via Britannica (to verify Wikipedia) was this; I could power a 1 Watt LED for 420,000 seconds (4 days, 20 hours, 40 minutes) or 420,000 1 Watt LEDs for a second.