Interior light left on..caused damage?

A one hour drive is insufficient. You should leave the Prius READY overnight (no need to actually drive the car), or hook up a battery charger to the battery overnight.

 

You say the interior light was left on for 16 hours. There are two overhead lights, one in the front and the other in the rear ceiling. I am going to guess that the two lights consume 20W of power or 1.7A of current.

1.7A x 16 hours = 27Ah. If the battery was 100% fully-charged prior to this episode (which is unlikely) then it would be drained to less than 50% capacity after this incident. If the battery was 75% of full charge (which is more likely) then it would be drained to less that 25% capacity.

Since the Prius 12V bus operates at ~13.8V when the car is READY, the charging current is not going to be very high. On average you might expect around 2-3A charging current. To make up 27Ah you would have to keep the car READY for 9-13 hours assuming no power was lost to heating up the 12V battery (which is not a realistic assumption.)

Hence it would be easier for you to hook up a battery charger if you can park the car near an AC power outlet.

You can measure battery voltage after the car has been IG-OFF for 8 hours, and that will give you a very rough idea of battery charge. An AGM battery which is fully-charged will measure 12.9V. 75% will be around 12.6V.

 

The greater risk of running the Prius battery flat, due to its smaller capacity than common nonhybrids, was the reason I switched the interior lights to LEDs that draw about one tenth the current of the original lamps.

 

OK, if only one light was on then the charging time needed will be half of the values I earlier estimated. Note that the battery voltage measurement is not reliable unless it is done after the car has been IG-OFF for 8 hours or so (which allows battery surface charge to dissipate.)

 

Dave you can put the car in ready mode with the fob in the slot, but remove the ordinary key from the fob first then lock the car.

The engine will start and stop from time to time to recharge the HV battery as required this in turn charges the 12 volt battery when in ready mode.

Remember the Prius does not have an alternator so the engine does not have to be running to charge the 12 volt battery but it will run occasionally in ready to charge the HV battery.

 

The festoon dome light there is the same style I use, but the wedge map light is not. This style, with LEDs on all four sides and on the end, would generically work just about anywhere but wastes a bunch of light (and power) in unused directions. I have a model with LEDs just on the end: this (polarized), obtained at a flea market, and something similar to this (selection has changed).

The lower door starts with the same incandescent lamp, and could also use the wedge unit you found. But I have this (non-polarized) and something similar to this. To fit, I had to leave out a transparent plastic piece of the car's lamp housing, but this change is non-destructive and reversible.

There are several other LED threads here on PC, using products from many different vendors. I don't recall anyone else used Wiredco.com products. Numerous readers have used Superbrightleds.com parts, though many seem to have moved on to other venders they like better.