The trope of Light Equals Hope is a visual one, used by cinematographers and other film professionals who really like their Symbolism.
Essentially there's a light somewhere in the scene. It is the literal light of Hope. Because there's a chance evil could win — there is an encroaching darkness. The suspense builds as the scene flickers between light and dark.
If in the end the light is not snuffed out by the darkness, there is hope of things going well for the characters. If the darkness wins and the scene is plunged into shadows, then evil (or another dark trait) is getting its turn at bat whether we like it or not.
This is just visual media playing on the old concepts of bright light, especially sunlight, being good and purifying; nothing evil can survive when someone has shed some light on the subject. Rationally, we know this to be untrue, but the symbolism is solidly rooted in visual storytelling.
Commonplace in media where creatures literally cannot deal with sunlight, such as vampire fare.
Naturally, the inverse works as well. All seems lost for the protagonist(s), but a literal ray of hope breaks through the gloom and things begin to change in the hero(es)' favor.
There is also a variation that is not good/evil related but still uses the light as hope symbolism, such as a light bulb swinging or flickering while a life hangs in the balance. If the flickering stops and the light continues to shine, the endangered life will pull through, even if some downtime is required. If it goes out, the character has died. This is also true if the bulb's effectiveness is diminished because something has splashed onto it like blood or ichor.
Subtrope to Light Is Good. Any usage of this will inevitably have some form of Light/Darkness Juxtaposition. See also Cue the Sun. Can cross over with Empathic Environment. Compare Lights Off, Somebody Dies wherein the lights going out allows evil a brief moment to do its dirty work.
This trope is often used in a significant turning point in a plot, so beware UNMARKED SPOILERS.
Examples:
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Fan Works
Puella Magi Madoka Magica
- Crónicas de un gato a medianoche: Double Subverted. Initially, Homura's bitter familiarity with Mitakihara city lights represents her countless resets and failures to save Madoka. Then, paralleling the canonical scene in Puella Magi Madoka Magica The Movie: Rebellion, midway through "Demon's Madness", she feels a gentle crack of light seep deep in her bones when Madokami comes to retrieve her soul and relieve her of her pain. This happens after the narration states she's already given in to despair. The light prompts her to recall Madoka's promises and soft laugh. Inevitably, she rejects hope and becomes Homucifer, her wings submerging the universe in shadows.
Films — Animation
- Balto is a fictionalized account of the desperate sled dog relay of diphtheria antitoxin from Nenana to stricken Nome in 1925. The telegraph station at the edge of town has a red lantern lit outside its door that acts as a guide light for the final dog team, and to signal the townsfolk that the team has attained its checkpoints en route. After many hours without a message from the nearest checkpoint, nor any sight or sound of the finishing team, the telegrapher sadly extinguishes the lantern, believing the antitoxin relay has failed.
- Frozen (2013):
- At the end of "Do You Want to Build a Snowman," when Anna and Elsa mourn the deaths of their parents, the scene's lighting gradually fades.
- Anna expresses her hope for Coronation Day in part by singing "there'll be light" again.
- Elsa expresses her joy in embracing her powers by saying she'll "rise like the break of dawn" as the literal dawn begins.
- When Elsa accidentally strikes Anna with a deadly curse, it's sunset.
- When Grand Pabbie reveals the cure for the curse on Anna, the sun is rising.
- The Princess and the Frog: Ray is a firefly who was a literal ray of hope for Tiana and Naveen, using his amazingly bright tail light to banish and even destroy the shadow creatures sent after them. When Dr. Facilier steps on him, he only lives long enough to see Naveen and Tiana declare their love. His light goes out. Shortly thereafter, though, they give him a proper New Orleans funeral and once his body is sent off, Tiana, Naveen and Ray's family are bathed in light as he is rewarded for his service by becoming a literal star in the sky. Everyone's grief is wiped away by hope and joy.
- The villain of Don Bluth's feature Rock-A-Doodle keeps the entire county under the gloom of rainclouds, flooding the valley and making the smaller Funny Animals easy pickings for himself and his lackeys. Some of the victims keep their tormentors at bay with a flashlight, but as the villain points out smarmily, "When the batteries expire, so do your friends." Up until the climax, The Dragon has been able to keep The Hero sidelined, but once Chanticleer gets his Heroic Second Wind, his crowing raises the sun, which dissipates the clouds and negates the villain's Black Magic. It's amazing what sunbeams can do.
Films — Live-Action
- Used in Children of Men when from the first frame we see Jasper (Michael Caine), he's covered in sunlight. Theo (Clive Owen) comes out from the darkness of the train station into the light to hug Jasper, symbolising Theo's only redemption from his bleak life.
- Fatal Attraction: Alex, after she's been rejected, is sitting on the floor of her apartment with a broken lamp. She has the switch in her hand and is clicking it back and forth. Click: lights on. Click: lights off. It's an indication she's (consciously or unconsciously) weighing her choices. Lights: leave him alone and move on with her life. Dark: Go all vengeful stalker and ruin his life. At the end of the scene, she clicks the switch one last time to leave her sitting in darkness. Her behavior becomes increasingly unhinged from that point forward.
- The Force Awakens: Rey, Finn, Chewie, and Han are racing to stop the First Order's current sun-eating Death Star-like superweapon. When the sun goes out, it's all powered up to blast a planet into space dust. On the way, Han Solo meets with Kylo Ren. As Han reaches toward Kylo, we see the sun outside, its light weak and small but still there. Kylo says that he's facing a struggle he's not strong enough to handle on his own and asks for Han's help. Han reaches forward as Kylo holds out his lightsaber. The sun is extinguished and Kylo guts Han, thanking him for helping.
- Fright Night (1985) has Charlie with his back against the wall as the vampire closes in. But daylight happens, and he throws open the curtains to let the sun shine in, reversing the tide of battle in an instant.
- Godzilla: King of the Monsters (2019): After Godzilla is seemingly killed, Ghidorah usurps Godzilla's dominance to begin destroying the world with nothing able to continue stopping him; torrential stormclouds perpetually darken the skies. When Mothra shows up at Castle Bravo, a blast of her God Rays clears the storm and bathes Castle Bravo in brilliant golden-white light. Her presence not only makes the cast aware that Ghidorah's control over the Titans isn't absolute yet, it directly alerts Monarch that there's a chance to bring Godzilla back and turn the tide.
- Great Expectations: Pip goes inside dark, shut-up Satis House, and meets Estella, recently dumped by Drummle. She's sitting in the dark living room in Miss Havisham's old chair, deep in depression, seemingly resigned to growing old alone. Pip refuses to accept this, tearing down all the curtains and the boards over the windows, letting light into the house for the first time in decades. Pip and Estella go running off together arm in arm.
- In The Lord of the Rings: The Two Towers, The Battle of Helm's Deep takes place at night, in a heavy rainstorm. Saruman's army massively outnumbers the Rohirrim, who are certain they have no chance to win. However, when dawn breaks and light appears on the horizon, The Cavalry led by Gandalf the White and Éomer arrive and turn the tides of the battle.
- The Lord of the Rings: The Return of the King: with Minas Tirith's defences breaking apart by the orc onslaught, the Rohirrim again lead a climatic charge, with the dawn in the background, figuratively bringing back the light.
- Pacific Rim shares this with Empathic Environment. The entire film from our first look at the Shatterdome takes place, day or night, in torrential rain. No matter how many fights there are, the humans win them at a dear price: lost Jaegers and lost lives. Only after Mako and Raleigh have scored a decisive victory do we finally get to see the sun come out.
- In The Professional, Mathilda's terror after her parents and brother are brutally murdered by corrupt DEA agents and cops is contrasted with her relieved expression as Léon opens his door to help her, and light floods across her face.
- Stairway to Light: The mental patients of an 18th-century Bedlam House are kept locked in chains in a dark basement prison. The light at the top of the stairs to the outside symbolizes mental patients being liberated from chains and, hopefully, cured.
Literature
- Longsummer Nights: At the end of "Seeds of Solace", the door to River's mother's room creaks open and lets the light in, reflecting how River is beginning to heal from the grief they've been carrying around.
- The Lord of the Rings: When Sauron's magical darkness spreads towards Gondor, Frodo and Sam witness one last ray of light shining on the head of a vandalised royal statue briefly, signifying the hope for the return of the king.
- Tyrant of the Tower Defense Game: Due to the Nightmare thriving in the darkness of the Lake Kingdom, any source of light is considered vital to maintain one's sanity and hope. This is why the safe points where the main characters set up camp are flooded with mysterious lights. This association between light and hope is repeated multiple times in the series in characters' dialogues and inner thoughts.
Live-Action TV
- Fraggle Rock: In "The Day the Music Died", Gobo sits in the darkened Great Hall, so tired that he's barely able to lift his hand to strum his guitar. But as he tentatively starts to sing, Ditzies begin to appear, the Great Hall begins to brighten, and the other Fraggles wake up, joining in the rousing song.
Video Games
- Darkest Dungeon: A frequent connection is made between hope and light versus despair and darkness. This is most obvious in how having a low Torch level causes various debuffs, and how the primary human religion is worship of an entity called "the Light".
- Darkest Dungeon II takes this to another level from the first game by having the torch atop your Stagecoach literally be a representation of the remaining hope in the world, and it's your job to carry it to the Mountain so that you can face your failures and undo the apocalypse. Contrasting the first game, you primarily replenish your Torch by engaging in altruistic actions in Assistance Encounters.
The Academic: We are the Flame, burning brightly for all the world to see!
- Dark Souls: The First Flame was the first fire to ever exist, signifying the Age of Fire and the rule of the various Gods that reign over the world. Should the flame ever go out, the Age of Dark will occur. The fire fading is implied to be the cause of the curse of the undead plaguing mankind. To prevent the Age of Dark from ever happening, linking the fire and perpetuating this is the big goal of each game. Subverted, as it is implied that linking the flame and keeping the Age of Fire going is an affront to the natural order of the cycles the world is going through, Gwyn linking the flame for the first time being referred to as "the first sin".
- The Elder Scrolls IV: Oblivion: The Oblivion Crisis begins when the Dragonfires, a symbol of the imperial family and a Cosmic Keystone that maintains the barrier between the physical world and the Realms of Oblivion, are extinguished. One major city is promptly wiped off the map, and the main plot revolves around finding the last person with Royal Blood to rekindle the Dragonfires before the Thinning Dimensional Barrier collapses entirely.
- Library of Ruina: The Abnormality embodies the crushing weight and hopelessness of nihilism and is themed around being blind and lost in one's worst vices. Thus, the strongest counter against it is Hope, represented by the four original magical girls desperately reaching their hands out to a white light breaking through the darkness surrounding them. In the fight proper, the move allows whoever is being targeted by Nihil to beat them in a clash.
- Stray (2022): When the cat and B12 finally manage to open up the dome, the previously plunged into shadows walled city gets its first taste of sunlight after centuries. This is treated as a symbol of hope for a better future, rising tall above tragedy. This is why the zorks, ravenous beings representing humanity's sins, are summarily burnt to death by the sun's UV radiation.
Web Animation
- The Amazing Digital Circus: "The Mystery of Mildenhall Manor": Pomni and Kinger leave the "Hell" basement by going up a staircase that is symbolically brightly lit at the end. Also, while escaping the Hall of the Damned, Kinger starts glowing brightly as he holds his breath. It's also inverted with Kinger regaining lucidity in the darkness, where he gives some advice to Pomni so she can make the best of her existence in the Circus.
Webcomics
- Daughter of the Lilies: Light Is Good, while the demonic Drath spirits manifest as clinging shadows that infect or outright overwhelm their mortal targets through despair. On two occasions, mages who rescue Drath victims get a sudden heavenly backlight.
- Homestuck: The aspect of Hope is associated with Light 'em Up powers more often than the actual Aspect of Light. When Jake Harley, Page of Hope, temporarily gets the potential of his Hope-y powers unlocked (already being of a Class that's all about his Aspect's potential) he unleashes a massive sphere of blinding white light that nothing and no one can interfere with until it passes.
Western Animation
- Cordell Barker's cartoon The Cat Came Back (1988) has Old Mister Johnson take a railway handcar into the Canadian mountains in an effort to abandon a troublesome cat. He derails at one point, and tumbles down a mine's air shaft into utter darkness. Played for Laughs as he lights a match to assess his situation, and sees hundreds of rats staring back at him. One rat blows out the match, just before a Gory Discretion Shot. The man survives, though thoroughly nibbled.
- Gravity Falls: The episode, "Summerween", has Dipper, Mabel, Candy and Grenda racing against time to gather enough candy to satisfy the Summerween Trickster. His deadline is when the last Jack-O-Melon is blown out. The kids make haste and manage to get enough candy with time to spare, but because Dipper was embarrassed by his childish costume and more interested in looking cool for Wendy, he takes off his costume and shoves the candy out of view when Wendy comes by. Unfortunately, he shoved it right into a creek where it all floated away. It's gotten late enough that the townsfolk are blowing out their Jack-O-Melons, casting the main street a little deeper into darkness with each one. Grenda thinks quickly and grabs the last one from Old Man McGuckett before it can be blown out. Unfortunately, her gusty sigh of relief is enough to snuff the flame. The Trickster immediately walks out of the darkness, ready to take them.
Real Life
- Survivors of the 7/7 terrorist attacks on the London Underground
recount climbing out of the bombed train carriages, brusied and bleeding, and walking on the side of the tracks in total pitch darkness towards the nearest station for help – the literal light at the end of the tunnel.
