How do I turn on the lights?

Hint 1 of 10:

It seems very dark in the lighthouse.

Hint 2 of 10:

Maybe the power is out?

Hint 3 of 10:

Check outside the house.

Hint 4 of 10:

How can you refuse?

Hint 5 of 10:

Look for a shed to the side of the house.  (Go toward the car, then back to
the right side of the house.)

Hint 6 of 10:

The shed is padlocked, so you'd better find a key.

Hint 7 of 10:

Try near the front door.

Hint 8 of 10:

Look in the front porch lamp for the key.