I've also made these without handles as a heavy duty lampshade, and from smaller cans too, you can adapt this to your own needs.
Step 1: Materials...
A length of 5 amp twin core electrical cable.
A Lamp holder.
A standard 3 pin mains plug. (3 amp fused). Dependant on you home country
A 6" piece of wood. (brush handle or in this case old curtain pole).
A couple of woodscrews.
Step 2: Tools...
Drill bits, Step drill/Hole saw if you have either.
Nail or centre punch.
Step 3: Warning!
2 - When cutting and working tin it is safer to wear gloves and eye protection.
Step 4: Mark the Centre
you can just use a ruler to measure or using dividers work from four opposite sides
until you find the point where all lines cross.
Mark it using a centre punch or a nail, this makes it easier to drill.
Step 5: Drill
You can drill a ring of holes around the inside of a 30mm circle then cut it with
tin snips or strong scissors, or a hole saw or step drill if you have one, then tidy the
edges with a file.
Step 6: Make the Handle
good, if it is round cut a flat 30 - 40mm long in one end - I used a rotary tool to also
cut a curved groove for the edge of the can to sit in so it is a more secure fit.
Mark the position of the handle on the bottom of the can, and drill two 3mm holes to
take screws, and screw the handle in place.
Step 7: Ventilation
Step 8: Finally...
I won't include how to wire the lamp holder and plug, as if you don't know already then
I'm not qualified to instruct you and you should seek advice from someone who is!