Since it's late and i only have a few minutes, this is copied from post 24 of the disABILITIES FAQs thread.
There are not actually any attractions at WDW that use lights that are technically strobe lights (i.e, fast, regular flashes of light) and they do not have any warnings for seizures and/or strobe lights on any attractions. Where they do have flashing lights, they are always irregularly flashing, which is a different situation.
Most true strobe lights flash many times per second, but slowing to 5 flashes per second or less means that the majority of even photosensitive epileptics are not going to have a problem. Only about 3-7% of people with epilepsy are photosensitive and have problems with lights; of those, only about 5% would have a problem with a light flashing 5 times per second or less.
If you do encounter flashing lights and are concerned, the Epilepsy Foundation recommends covering one eye and turning/looking away from the direct source of light. The reason for covering only one eye and looking away from the direct light is to prevent both eyes from sending exactly the same information to the brain.
This should work whether someone has a problem with epilepsy or has problems with lights for another reason.
This is a list of attractions I know of with light effects of some type. Many attractions have a single light or 2, so it is difficult to list all. But, I am sure that we have included most of them.
MK
[*]Enchanted Tiki Room - periods of darkness with simulated lightning. The lightning is random and short.
[*]Pirates - some lightning flashes in the first dark part of the ride. Some random flickering from simulated flames in the last half.
[*]Big Thunder Mountain Rail Road - there are no light effects in this attraction, but if you are riding on a sunny day, you will go in and out of dark tunnels repeatedly at high speed.
[*]Splash Mountain - on a sunny day, there are several places where you will go from dimly lit indoor areas to outdoor. The ride moves slowly, so the change is slow. There is a single bright flash when your picture is taken during the big drop.
[*]Haunted Mansion - almost at the end of the preshow, there is a flash of lightning at the top of the ceiling. Boarding area includes flickering wall sconces.
[*]Small World - the end scene includes numerous ropes of white lights that blink on and off in a regular pattern. I would describe it as a traveling pattern - as one light goes off, the next light in line goes on. So, the light travels down the strand of lights.
[*]Buzz Lightyear - just before the last room of the ride, there is a long narrow tunnel room with swirling red lights and flashing white lights. The swirling and flashing are not rhythmic.
[*]Stitch's Great Escape - Most of this attraction takes place in the dark, but there are some random light flashes at times (while looking for Stitch)
[*]Space Mountain - multiple flashing lights
Epcot
[*]Spaceship Earth - the first part of the ride and the last part of the ride are dark, long and narrow.
The entrance 'tunnel' has screens high on the wall, warning that your 'time capsule' will turn and descend at some point during the ride. The screens are bright compared to the walls.
The exit tunnel has some lighting effects, but not flashes.
[*]Ellen's Energy adventure - includes a movie where parts are dark and then light suddenly appears (the 'Big Bang' theory of earth's creation). Also includes a section with ‘confetti’ lights in different colors ‘falling’ from a point in the ceiling to the floor across guests.
[*]Mission Space - Includes a flash of light for a picture and flashing instrument lights to alert ‘astronauts’ to push particular buttons. There are also small amber colored flashing alarm beacons at the end of the ‘runway’ when you are landing on Mars.
[*]Test Track -(currently closed for renovation - not sure what it will include after renovation is completed) includes a light flash for a picture. Also, during ‘evasive maneuvers test’, your ride car will be in a dark area with bright truck lights suddenly appearing in front of you. There is a ‘heat test’ which involves bright yellow/amber lights. They do not pulsate, but are turned on and then off suddenly.
[*]Living with the Land - simulated thunderstorm in the first few scenes. The first part of the attraction is dim; the second part is in a greenhouse, where the light can be a bit of a shock when you first enter. The ride boat moves slowly though.
[*]Soarin' - One of the last scenes includes soaring over a city at night, over a highway. The headlights of cars are either white (headlights) or red (taillights) and are moving quickly. The end scene includes fireworks
[*]Journey into Your Imagination - Some flashes of light. One bright flash near the end where a picture used to be taken.
[*]El Rio del Tiempo (Mexico) - fiber optic fireworks in the ceiling and wall in the last scene
[*]Maelstrom (Norway) - near the beginning there is a spinning, pulsating light. It is irregularly pulsating
[*]American Adventure - the Chief Joseph sequence has a few stokes of lightning. The World War 2 sequence on a ship includes arcs of welding light.
Studio
[*]Star Tours - flashes of light during the attraction (you are in a space ship and end up in a spaceship fight)
[*]Voyage of the Little Mermaid - some flashing light, some twinkling lights and some pulsating blue/green laser lights above your head to simulate the top of the water. All are random
[*]Rock N Roller Coaster - one bright flash of light during picture taking
[*]Tower of Terror - one bright flash of light during picture taking. Elevator door opens suddenly to give a view of outdoors (so bright light on a sunny day). Some twinkling lights during the early part of the ride and I was too busy being scared and holding DD down to notice any more.
AK
[*]Festival of the Lion King - one act includes twirling flaming sticks
[*]Dinosaur - dark ride with sudden appearance of dinosaurs in front of you. Random flashes of light. One big flash as a picture is taken.
[*]Expedition Everest - includes some bright light effects
My mother has migraines and finds that reflections off water (especially the World Showcase Lagoon) bother her on a very bright day. She also has problems sometimes with the 360 movies in China and Canada because they are all around.
Things that are very important to be aware of are sleep deprivation, dehydration and getting off schedule with medication. All of those things can lower the seizure threshold (how easy it is for a seizure to occur). It's very easy to get off schedule or forget medication while on vacation. One things we have found that helps with this is to actually use an individual dose medication container and an alarm (on our phone or iPod) as a reminder for medication times.
