Night Light

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.

Hatchling to Adult
Night Lights have an appearance similar to both a Night Fury and a Light Fury, since they are 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 black and white in coloring without a specific pattern.

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 the Night Lights 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.

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.

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.