Both Set Energy rows allowed 1-30 keV, an arbitrary spinbox default; nothing downstream validates the request (daq.change_energy forwards straight to bec). Shared ENERGY_MIN/MAX_KEV constants now bound both spins to 4-20 keV with a tooltip flagging the range as pending Beamline Scientist confirmation. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>