Good idea for a thread alright!
I use a bedside lamp, but there has to be a dark background for it to work.
Overhead lights are good, like that snooker hall effect.
I tried all manner of led torch lights and headlamps, even a party Laser machine!!
Normal led stuff is quite good, or as mentioned above if you can combine LED with overhead, there's some 5W ones in my kitchen they're great for it.
The type of LED lighting that really shows vapors well is too bright to be comfortable when your vaping! I have one of those on my bicycle! (T5 CREE c/w 4x18650)
Perhaps a green laser pen with some diffuser might work but it's messy.
LED downlighters are good, and the best of the widely available ones should have 1-5 LED chips, the ones with multiple (15+) "early" diodes are crap, (but might be better for vapor for all I know!).
Halogen downlighters would be great too but more costly to run, and hot/ possible fire/burn risk.
I wondered if certain display types of halogen downlighter would suit vaping real well.
Not sure the exact term for it, not dichroic? but they have it in all those Swarovski crystal shops and it has reddish and purple tones.
I'd like to play around but I'm limited where I have the vape now.
Also wonder if warm white or cool white LED stuff would work better but as long as it's strong...?
An initial google of lighting for smoke or fog has pulled up interesting photography articles and diagrams,
and a 20 min video on the subject! Imma' get me a cup of tea and some volcano bags and watch this I think.
Black background, lighting from side (heard this more than once)
Would love to hear more too.
Since I took up vaping I have also thought about those machines that measure particles in the air, of fog, or exhaust gas for example, like in road tunnels,
or if we could use these machines to judge vaporizers or see vapor better?!