- The 'lights out' puzzle sometimes appears as an Ushabti puzzle in the Lower Tomb in any tomb variation. Stepping on a button flips the light's state between off an on, as well as the buttons directly next to it in the four cardinal directions. The objective is to get all buttons lit at once.
- Traditionally, you are meant to turn all the lights off (like in the original 1995 game), which is why it's called 'lights out'. Either way, it doesn't really matter as you can reverse light states for whichever type of lights-out puzzle you are solving.
- If you are familiar with solving a rubik's cube with the CFOP method, this method is similar, except instead of CFOP, it's just FP and is a lot easier.
- "The best way is to just turn all the lights out first!" is a common misconception and makes no sense. It's just as hard to get all the lights off as it is to get the lights on, there's literally no difference. By doing it like this, all you're doing is adding another step for no reason at the end to flip the board state. It does NOT make it easier.
- Similarly, "Just make only all the corners lit first!" is also a popular misconception that makes no logical sense, because with this you're essentially saying "Just get it one move away from being solved!". It doesn't actually help in any way.

- In this guide, a green circle marks what button you must activate
- Click on pictures to zoom in!

See all up to date Forewarned guides here:
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This is the algorithm to solve ANY 3x3 'lights out' puzzle!
Remember, any pattern and solution can be rotated and it will solve just as easily!

If you cannot wrap your head around the text guide below, use this video guide that explicitly walks you through every step:
https://www.youtube.com/watch?v=LnYCcUc4FIo

Starting from the top, step on buttons UNDERNEATH OFF lights to turn the light above it ON. For example, if you want to light up the top left corner, press the button underneath it (which would be the left edge). When the top row is fully lit, do the same for the middle row. Continue with this until the top two rows are all on. If you cannot do this, re-read this sentence carefully.
Now your puzzle should look like this:

It doesn't HAVE to be the "top" rows, they just need to be two rows next to each other. The solutions below all just have the unsolved row on the bottom, but you can just rotate the puzzle and it will have the exact same solutions.

Lighting up two rows like this leaves only 5 essential remaining options for solutions (7 solutions in total, but two of them are just reversed versions of the same solution). Now all you need to do is remember them!
YOU DO NOT NEED TO PRESS BUTTONS IN A SPECIFIC ORDER.
There are basically three types of solutions: Two "Triangle" cases, two "T" cases, and three "Weird" cases.
These solutions are as follows with ways to remember them (that I use personally):

Puzzle:

Solution:

Mnemonic:
Draw a triangle. Start from the outside on an unlit button, and cross over the inside. You may notice that pressing the unlit button just turns it into the first T case below, just rotated 90 degrees, so you can also remember this solution in this way.

Puzzle:

Solution:

Mnemonic:
Same as above but reversed.

Puzzle:

Solution:

Mnemonic:
Tetris T pointing at the only unlit light

Puzzle:

Solution:

Mnemonic:
Inverted Tetris T on a table.

Puzzle:

Solution:

Mnemonic:
Two towers.

Puzzle:

Solution:

Mnemonic:
IDK, I just remember this one. It's symmetrical, I guess. Use any pattern you spot that relates to something memorable, and remember it that way. It could be seen as a bow and arrow, or a bird. If you look at the buttons you don't press, it's the same as a fish shape OLL case on 3x3x3.

Puzzle:

Solution:

Mnemonic:
Same as above but reversed.

Then simply press buttons in an X shape (all four corners and the center)! This flips the state of every light on the board once.

https://youtu.be/fpWYSWNMKnA