Night Light

"They are the ridiculously adorable offspring of the Night Fury and the Light Fury. It was some debate on what to call them: Day-and-Night Furies, 24-Hour Furies. But in the end, we settled on the Night Lights."

- Fishlegs

The Night Light is a hybrid between a Night Fury and a Light Fury that first appeared in How to Train Your Dragon: The Hidden World.

Official Description
"The Night Lights are the offspring of Toothless and the Light Fury. They live in the Hidden World and share some abilities of their parents. Like their parents, Night Lights have powerful plasma blasts. They fire first to warn and only openly attack when threatened."

- Dragons: Rise of Berk

Egg
In Dragons: Rise of Berk, the Night Light's egg has a readily visible scale pattern and is roughly the same shape as other common dragon eggs. It appears to have a base color of black with varying amounts of white speckling.

Hatchling to Adult
Night Lights have an appearance similar to both a Night Fury and a Light Fury since they are a hybrid of the two closely related species. They appear to have small fins on their back, like a Night Fury whilst lacking the single spine of the Light Fury. Their tail fins are also much like that of a Night Fury's. They have four ear-like appendages on their head and are piebald in color.

Firepower
Night Lights are capable of firing explosive plasma blasts very similar to that of their parent species. Night Lights and Light Furies share a similar amount of control in the timing of the plasma blasts' explosion.

Cloaking
Like their parent species, Night Lights possess the ability of "cloaking". Cloaking occurs when their skin heats up, which causes their scales to have mirror-like qualities, allowing them to temporarily blend in with their surroundings.

Speed and Agility
Night Lights are very fast dragons, as babies can easily keep up with their parents in flight and even spin in the air with no signs of slowing down.

Weaknesses
Just like their parents' species, Night Lights are unable to fly if one of their tail fins/flukes is destroyed.

Behavior and Personality
The Night Lights' behavior falls somewhere in between that of each parent. They are playful and curious by nature, but fiercely protective when danger is present. They don't appear to be scared of humans and even allow themselves to be touched by them.

How to Train Your Dragon: The Hidden World
Toothless and the Light Fury became mates and have three offspring, which Hiccup named Night Lights, as a combination between the names of their parents' species.

When Hiccup and his family visited the Hidden World, the three babies were playing with their parents. After Toothless recognized his former rider, the two went for a flight, with the Night Lights flying close to them.

Dragons: Rise of Berk
The three offspring of Toothless and his mate have been introduced in this game as Unique Dragons. Each of the Night Lights lives on a small sea stack that surrounds the Radiant Meadows.

Trivia

 * The Night Light is the first dragon hybrid that appears in the How to Train Your Dragon franchise.
 * The Night Light's personality and mixed color traits greatly resembles real life bicolor cats and kittens.
 * In Dragons: Rise of Berk, Night Lights keep their hatchling appearance even after they reach the Broad Wing stage of growth, presumably to reflect the film.
 * Night Lights are very similar to giant pandas and killer whales as they both have black and white colored bodies.
 * In a piece of concept art from The Art of How to Train Your Dragon: The Hidden World, two black Night Lights have green eyes making them resemble a baby Night Fury while the white Night Light has blue eyes making it resemble a baby Light Fury.