Thanks for testing! Seems like it's more suited for LED bulbs. Still looks nice though.
The chart of incandescent bulbs info I pulled from the old site.
E10 Base Bulbs
BULB VOLTAGE AMPS WATTS
#14 2.47V .30A .741W Standard for Jensen #15
#131 1.30V .10A .130W Low HP motor & Jensen #15
#502 5.10V .15A .765W Stepper-motor Generator
#359 1.35V .06A .081W Low HP motor & Jensen #15
#222 2.25V .25A .563W Focused-beam for Jensen #15
#352x 3.00V .07A .210W Standard for Jensen #15E