Using the rectangle tool, create one tall rectangle for your bulb with
a black stroke color and no fill for now.
Using the line tool, draw a horizontal line through the rectangle at
about 1/3 from the bottom. Place a vertical line down the middle of your
rectangle from above the top to below the bottom.
Grab the intersection of the horizontal line and the rectangle, drag
that corner out from both sides, as equal as possible, about 1/2 the width
of the rectangle. Do the same to the top and bottom sides of the original
rectangle, dragging out about 1/4 the width of the original rectangle.
Using the arrow tool mouse over in he middle of the top and bottom halves
and drag them out to create smooth arcs.
Click the center vertical line one and remove the line by hitting
delete. Remove The other three sections of that center vertical line by
repeating the process.
Click on the fill tool (paint bucket) and select
the background color. Open the Fill tool. Select Linear Gradient. A black
to white gradient should come up. Move the white slider to the middle of
the gradient. Click on the area where the white slider WAS and a new color
swatch comes up. Click on the swatch and then the color pallet on the
right and select black as your color. (The example used a Dark green in
place of the black.)
Using the fill tool, fill the TOP part above the horizontal guide line
with this gradient.
Click
on the options for "Transform Fill" while your fill tool is selected and
then click on your gradient. move the center point to the right of center
of your image, still within the borders of the gradient, and rotate the
gradient so the white line is parallel with the right line. squeeze or
stretch your gradient so that there is grey on either side of the white,
and no black shows.
Click on the fill tool (paint bucket) and select the background color.
Open the Fill tool. Select Linear Gradient. The previous gradient will
come up. Move the white slider slightly so the gradient is not identical
(this prevents the grouping of the two gradients as one).
Using the fill tool, fill the Bottom part above the horizontal guide
line with this gradient
Click on the options for "Transform Fill" while your fill tool is
selected and then click on your gradient. move the center point to the
right of center of your image, still within the borders of the gradient,
and rotate the gradient so the white line is parallel with the right line.
squeeze or stretch your gradient so that there is grey on either side of
the white, and no black shows.
Using
the arrow tool mouse over the horizontal line inside the image and drag it
from the center to give it a rounded appearance.
Using your arrow tool, click once on the Horizontal line separating
the top and bottom and click delete. Do the same for the horizontal lines
outside the object
Highlight your work and select the menu INSERT => CONVERT TO SYMBOL.
Call it bulb and give it the properties of a graphic.
B. Create the Base
Create a square using the rectangle tool with black line color, and
white to black to white linear gradient (see gradients above)
Draw
a Vertical line down the middle of your square (as a guide).
Drag the top and bottom lines down about 1/4 of the height along the
vertical line.
Bend the top two lines inward and the bottom outward to give each a
smooth curve.
Click
the line tool and add a line from the top left corner to the top right
corner. bend this outward slightly.
Remove all parts of the vertical line (guide)
Using the fill tool =>transform gradient to adjust your gradient to
move the center to the right side of center of your image and squeeze to
make the black to show up on the image.
Using the Fill tool and the fill panel create a new gradient. You will
need to adjust the gradient that is default or when you use it this will
be grouped with the adjacent gradient. Move the center white color over a
small amount.
Add
This linear gradient to the top oval.
Adjust the top gradient using the gradient options => transform tools.
Place the white vertical line just off (right) center in the main part of
the shape. with black way off the image. Rotate the gradient so the center
white is going from the off center line on the main fill part back to the
opposite side ( like 5 and 11 o'clock, or 7 and 1 o'clock.)
Highlight all and click INSERT => convert to symbol. Call it base
Using the line tool, draw a horizontal line through the rectangle at
about 1/3 from the bottom. Place a vertical line down the middle of your
rectangle from above the top to below the bottom.
Click on the fill tool (paint bucket) and select
the background color. Open the Fill tool. Select Linear Gradient. A black
to white gradient should come up. Move the white slider to the middle of
the gradient. Click on the area where the white slider WAS and a new color
swatch comes up. Click on the swatch and then the color pallet on the
right and select black as your color. (The example used a Dark green in
place of the black.)
Click
on the options for "Transform Fill" while your fill tool is selected and
then click on your gradient. move the center point to the right of center
of your image, still within the borders of the gradient, and rotate the
gradient so the white line is parallel with the right line. squeeze or
stretch your gradient so that there is grey on either side of the white,
and no black shows.
Using
the arrow tool mouse over the horizontal line inside the image and drag it
from the center to give it a rounded appearance.
Draw
a Vertical line down the middle of your square (as a guide).
Click
the line tool and add a line from the top left corner to the top right
corner. bend this outward slightly. 
Add
This linear gradient to the top oval.