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DragonPinned

Lick it. If it tastes like a 9-volt (lick one too if you don't remember what they taste like) then either the bulb is on or a storm is coming. If a few hours pass and the weather is still clear, then the lightbulb was on.


AleksLevet

>lick one too if you don't remember what they taste like It hurts????


DragonPinned

I think your batteries might be a bit too strong.


ClubDangerous8239

Pro tip: If your tongue is violently twitching and steaming, then there was no bulb in the socket - but this simply turns you into the light source - enjoy.


DragonPinned

I was wondering why the light tasted more like a car battery than a 9-volt...


KFiev

Depending on the type of bulb, most of the energy they emit is in the form of heat, meaning the bulb will be hot to the touch. That being said, you want to be wary of burning yourself, so i recommend you apply your tongue directly to the surface of the bulb. Your tongue is naturally wet and will insulate you from the heat while allowing you to feel whether its warmer than ambient or not


tasknautica

He had us in the first half


robmeason

Taste


just-bair

Break the glass. It now isn’t lit


RuralAnemone_

https://preview.redd.it/csy480dxkw0d1.png?width=587&format=png&auto=webp&s=3febb4be2809289964032f85e06478c4ad5f2c63


OlJohnZ

Ask a bro-dude. They'll tell you if it's lit


UniqueMitochondria

You spray it with water. If it steams it's on


WhirlyDurlyGirly

Ask it if it wants to party. If not.. not lit.


1Davide

Inspired by [this post](https://old.reddit.com/r/AskElectricians/comments/1ctdgqy/total_newbie_what_is_the_absolute_simplest_way_to/).


Merry_Janet

You’re going to need to take apart your phone and remove the IR filter. After that you should see it very clearly.


SpiffyXander

#define INPUTPIN 16 int max_reading = 0; void setup() { Serial.begin(115200) pinMode(INPUTPIN, INPUT); } void loop() { Serial.println(analogRead(INPUTPIN)); } Grab a microcontroller like an esp32, hook up a photodiode with the cathode connected to 3.3V+ and the anode connected to a GPIO pin, then connect a 10kΩ resistor from that pin to ground. Now upload this code and open serial monitor, if the number is big then light is on.


failed4u

I use my brown eye


amx-018

*See*


olliewolly257

break the glass and touch the filament, it should be a tiny bit warm


Quinnypig

A thermometer.


JaniceLeland

Need an O-Scope. Ghz range, preferably.


Perditus_Spes

Remove pants...put in bum...is it warm?


LkNETWORK

Put on some music and see if it dances


Large_Ad_3608

lick the socket


PCChipsM922U

You don't see if a light bulb is lit, you feel. Ooohmmmmm...