Loony Toons logic. You won’t fall until you realize you should be falling.

Love that this suggests that for vampires, it's all in their head

That’s what Terry Pratchett’s Carpe Jugulum tells us. With sufficient exposure and willpower vampires (or “vampyres” as this more modern variety calls themselves) can become immune to sunlight and holy symbols!

Literally Charles McGill

I wanted to see for myself and it looks like the spectra of the sun and moon are fairly similar:

Moon: https://olino.org/blog/us/articles/2015/10/05/spectrum-of-moon-light/comment-page-1/

Sun: https://seos-project.eu/earthspectra/images/Solar-spectrum_th.png

Looks pretty similar I gotta say

That being said, the intensity is of course much lower of the light reflected from the moon.

Vampire hunters with IR blasters!

Reminds me of the part in Bloodlines where you (a vampire) are captured and they run a series of tests, including shining UV rays on you (it doesn't do anything).

Seemed to work out for Blade.

I hear the Speedwagon Foundation uses intense UV.

Yeah, sunlight on clouded days doesn't hurt us either.

It's Loony Toons physics.

The BBC series Dracula really explores this trope in a really interesting way. Worth a watch without spoilering anything.

Huh... turns out I'm a vampire.

i love the idea of london being infested by vampires since it's almost always overcast, and vampires going on holiday to the nordics in the winter

We learned it like this at school:

Light beam bounces once or more, suck that victim dry, senor
Light beam bounces none or less, seek the curtains now, princess

Everyone is saying it.

But he's the OV (Original Vamp). According to Supernatural logic, the Alpha monster is immune or isn't affected as badly by weaknesses as converted monsters.

He wasn't, but Count Orlok from Nosferatu (1922) was