Electrical – Replacing recessed lights with pendant lights

You'd have to calculate the load of the circuit to determine if you have enough capacity.

Volts x Amps = Watts

So if you are in the US, you probably have a 15 amp circuit which should only be loaded up to 12 amps. Now go add up everything else on that circuit. Lets say you have 10 pot lights at 50watts each.

120v x Yamps = 500watts

= 4.1amps

Now lets say your two lights are 100W each, that's another 1.67 amps (200W/120V), so 5.7 amps total being drawn which means you would be able to add these without overloading the circuit.

If the circuit was already approaching 12amps, you would not have enough capacity and would need to run a new circuit.

A tricky situation. If you can't get a piece of texture matching siding that you can paint to match, then I'd go with Aluminum flashing that you can easily paint & profile to the siding. You'll want to caulk & then screw or pop rivet the siding or flashing chunk to just under the siding's closest above rib to act as a roof for your patch, you're screwing the patch into just the siding & not the building or sheathing. First though, screw in an oval piece of plywood to the building's sheathing to fit in the old hole & fill-up the recess to mount your patch & new fixture to, center drilled-out for wiring. Use aluminum screws or rivets to avoid rusting, caulk your patch to the siding & caulk your fixture to your patch. Also, screw plugs with plumbing tape into the new box's unused holes, even if it's a bottom one.