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]
Your suggestions for lighting the top of a 50 ft. sculpture being displayed at our state fair? [more inside]
A terrible, B.O.-like smell emanates from a room in our house at odd intervals. I have a half-baked theory, which we seem to have confirmed tonight. Is it at all plausible? If yes, what can we do about it? If not, what else could it be? [more inside]
How can i get rid of my white panda eyes after a skiing holiday? [more inside]
A rocket launch? Near San Francisco? What the hell did I see tonight? [more inside]
What are the health effects of very light cigarette smoking (1-3 per week) over the long term? [more inside]
I need a front light for my bicycle that can attach to a basket (as opposed to handlebars). [more inside]
What are these things on the light and telephone poles in my neighborhood? They popped up a few months ago and are replicating! Do I need to don my tinfoil cap? [more inside]
Three of our lights have burned out, and it's about time I replaced them. Thing is, I have no idea where to start. [more inside]
Does light (like heat) seep and weaken? [more inside]
Where can I get a light therapy box for S.A.D. in Toronto? [more inside]
Why are all light switches the same shape? [more inside]
What would you charge to diagnose a check engine light and replace the thermostat in a 2003 Toyota Highlander? [more inside]
I am looking for a lens for my Nikon D80 that works well in low-light conditions. Something relatively compact and not too expensive would be best. [more inside]
How do I wire up this infra-red mains light switch. [more inside]
When a candle is burnt indoors, what happens to the wax? An amount of smoke equivalent to the mass of the candle is released as it's burnt (?)--does this manage to escape the house, or does most of it stay in the room and coat the walls, floors, ceiling, etc.?
I have a budget of $75-$100 for a bike headlight. I am seriously considering NiteRider's MiNewt-USB. Does anyone have any other recommendations, or anecdata about the MiNewt? [more inside]
What are some great examples of paintings that make dramatic use of light and shadow? [more inside]
Who did this musical rendition of the Charge of the Light Brigade? [more inside]
OMGShoes: I have SauconyBullets right now. They're the best shoes I've ever had. I love them. Are there more ultra-light almost-nothing xc-inspired shoes like these? [more inside]
Would a wind-up light that doesn't rely on charging a battery, but uses a clockwork mechanism to directly power a small generator which lights up an LED, be possible? [more inside]
Why did my light fixture start turning off and on randomly? How do I fix it? [more inside]
Why does an incandescent light bulb have an broad, continuous spectra when viewed with a spectrometer? Why doesn't it have some lines like a sodium lamp? I guess I'm asking why photons come off of a black body and why are their wavelengths spread out. Bonus points for clarity and accessibility of the answers.
The "battery not charging" light on my dash went on; the mechanic told me I need a new alternator. Now the "battery not charging" light has turned itself off again. Does this mean my battery is, in fact, charging? [more inside]
How can I light up my apartment? [more inside]
I am a hobbyist photographer starting to do some serious studio work and I need help deciding on lighting equipment. [more inside]
Help finding the coolest burning bulbs for my bathroom vanity... [more inside]
We have a street lamp in front of our house that seems inordinately bright. We currently have cardboard in our windows to keep the light out so we can sleep at night. [more inside]
Looking for tips on creating a crazy black light troll costume. [more inside]
I'm wondering if there is an "organic" alternative to the very popular Crystal Light drink mixes these days. CL is full of artificial sweeteners, flavors, food coloring, the whole shebang.
Apropos of nothing, why would the wiring going to the fog lights on a US 2002 VW New Beetle have an extra unattached plug on it? This is not the lowest model, but came with the fog lights standard. I wonder if one of the upscale versions had fog lamps with two bulbs in each light or something that would have required another plug. On second look, it occurs only on the drivers side wiring, the passenger side looks normal. Please stop me from agonizing over this superfluous detail!
Where can I find some small, cheap flashing lights? It doesn't really matter what kind of light they are as long as they flash, a variety of colors would be nice but not necessary, the ability to turn them on and off is nice but not necessary, they shouldn't require a cumbersome power source but they don't need to last much longer than ten minutes, and I need to be able to obtain them by tomorrow (Saturday) in NYC. [more inside]