I have two problems with the bedroom door in my apartment. First, light gets through the 0.5-inch gap underneath it and wakes me up. Second, my Roomba bounces against it, causing the door to bounce against its spring doorstop and close, trapping the Roomba inside. [more inside]
Can the infrared light of a tv remote control be seen by airborne rescue personnel? [more inside]
Where can I find this light fixture? [more inside]
Photographers, what's the best time of day for a senior photoshoot? [more inside]
Why did push-button light switches go out of fashion? [more inside]
What is the name of the light that comes in as the background around 1:05 of this video? Bonus points for other wacky disco lights you can tell me about.
What are the odds that I'll see the northern lights? [more inside]
I love cranberry juice. It is the best juice. It is delicious. Is it bad for me? [more inside]
What are some good ideas to preserve your health and happiness if your flat has windows, but they are covered with exterior metal roller doors? [more inside]
Have you ever worked in an office without windows? [more inside]
I'm thinking of renting a room with no windows! Yes/No? [more inside]
How do I change the lightbulb inside this light fixture? It has no obvious fasteners or screws. I tried twisting it, but it's not really budging in a reassuring way. I'm staying at a rented beach house, and I am extremely leery of using undue force. [more inside]
Help me solve an optical puzzle. How might I make this fictional camera obscura work, given the parameters of my fictional location? [more inside]
I have a candle and its brightness is exactly one candle power or candela. If I buy a 10,000 candle power torch/flashlight, does that mean it's 10,000 times brighter (and what does that mean) or that I can see it 10,000 times further away? Are these the same thing and why do they seem unbelievable?
How much damage am I likely to do to my laptop if I leave it running with the screen closed? [more inside]
I need advice on how to pack as lightly as possible for a ten-day trip to Italy in late June. [more inside]
What's the least offensive light beer? [more inside]
Do they actually make and sell solar garden/path lights that aren't total crap? [more inside]
My boss' small business, an exhibition, spends a lot of money on electricity due to all of the display cabinet's lights. Is there a grant or loan we can get to change over to low power lights? We are in England.
[artFilter] Can anyone tell me what light sources are being used in this art installation? [more inside]
Just moved into a windowless office. The lack of daylight is killing me. Please suggest hacks to brighten my office. [more inside]
What just scared the crap out of me? Hallway light went on for about 15 seconds, then off, and is now burnt out. [more inside]
I have three big, lightweight, plastic spheres, and want to turn them into a three-light swag-type fixture. It would be cool to have all three controlled by one switch (kinda like a three-way floor lamp). Is there an easy way to do this? [more inside]
SurelyThisProductExistsFilter: Where can I find a metal tube with a threaded, transparent cap? [more inside]
I'm redesigning my workspace and starting with the lighting. I'm looking for suggestions for tall lamps that I can clamp onto my table and have shades that would cover large/high watt CFLs. [more inside]
Husband got red light ticket in the mail. It wasn't him driving. He sent it back and marked the box that he wanted to contest the ticket. What should he do in court (WA state)? Does he have to say who was driving (it's a photo of the car, no picture of the driver)? He kind of has proof as to where he was at the time of the ticket.
What's the best way to set up a dimmer switch in my room which is controlled by an alarm clock? [more inside]
I'm looking for something like a laser pointer that can be comfortably and easily attached to one's body. Not a flashlight; this light should show a clear point that can be used to check body alignment.
Which light-weight yet powerful laptop should I buy? I like the Sony Vaio Z, followed by the MB Air and the Thinkpad X200. Am I missing any models? [more inside]
I'm looking for something like Feynman's explanation for how a difraction grating works only for the absorbance of a colored chemical in solution. [more inside]
Why did my Subaru outback lose power steering on this rainy night? [more inside]
What are my options for a cheap, small Mac laptop? [more inside]
I have an uninsulated sunroom that gets pretty chilly in the winter, and want to make it so that it is at least room temp. and can be used for plants (without breaking the bank). Any ideas? [more inside]
While in various locales I have seen what what appear to be advertisments or graffiti that appears to be light generated that is projected onto a wall. I would like to use this technology for a sign for my business. I am not able to find anything with my google talents. Can someone point me in the right direction to locate and price this technology?
What equipment do I need to take clear photographs of 2-d artwork from above? [more inside]
Can I wire two light switches into one switch? [more inside]
I'm looking for a nightlight that could fit the description of the nightlight in the song Birdhouse in your Soul by They Might Be Giants. Ideas? [more inside]
Old sun-damaged skin all over my body--is it tilting at windmills to consider light therapy? [more inside]
7 days poolside... I need books! Tell me what to buy! [more inside]
I'm about to go on a bike accessory spending spree, and I wanted input on the most impenetrable locks, the most stylish helmets, and on everything from baskets to bells to headlights. I also would welcome any input on the best way to light a bike frame using electroluminescent wire. [more inside]
Who regularly sells 10-18mm tritium spheres (pictured at bottom), and where can I buy them reliably? [more inside]
Does one 200 watt bulb put out as much or more light than ten 20 watt bulbs? [more inside]
What is the term for the depiction in art of the sun's rays shining through or behind clouds? This phenomenon. Sometimes believed to be a form of theophany. Wikipedia has an article about it, but I can't remember the name to look it up. Thank you.
Help me turn a blindingly bright LED tube into a functional and decorative floor lamp! [more inside]
How do I grow food and be more sustainable in a shady city apartment? [more inside]
Calling all MeFi electricians: why does my light switch make a popping noise, and will it kill me? [more inside]
Please help me find replacement light bulbs for my gadget. [more inside]
Why do the glass parts of my light bulbs keep separating from the metal? [more inside]