The (almost) black color of the inside of the bottleneck is a bit too high
contrast and doesn't fit the rest of the icon (the only black part of it).
Use the "lamp yellow" as the base and lower the L in HSL representation of
the color so it just looks as darker lamp material.
After making the bottleneck wider (by shifting the curve to the left), the
curve became flatter which looks strange. Make the curve a bit more round
in the middle.
The handle of the lamp icon looks strange. While
the image of the lamp itself is taken from top,
the handle looks it's taken from bottom.
Fix this by moving the wide part of the handle
down and moving the "shine" line to copy the
outer edge. Also adjust the handle curves a bit
to connect the lamp in a more natural way.
The Light sublayer of the Lamp layer covers the lamp border
partly so it appears cut off. In addition, the Shine sublayer
doesn't follow the border properly. Adjust the curves in both
of these sublayers to fix the problem.
