I agree with wnateg, your lamp should have been regulated, either thermostat (best!) or dimmer (rheostat) + close observation (more risk but better than nothing).
I'm so glad you caught it early...& glad you're sharing this humbling boo-boo, as many others are making the same one, I can assure you.
Incidentally, since we're talking about "best practices" anyway, those tree bark "hides" are suitable only as added cage furnishings...being open-ended on both sides,
as well as being fairly "tall", they don't offer the cozy feel that BPs really want & need. The best hides offer some "back pressure" (snug feel from fairly low ceiling)
and have only one doorway, just big enough for (snake + meal) to easily enter. I'm glad your "angel" was eating, some other BPs may not have in this set-up shown.
All the best...