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Very interesting.

I suspect because my background is stage lighting, where we generally are looking for fluorescence ONLY (blacklight scenes). If we used blue light you would be able to see the performers, not just the puppets.
Plus the materials I'm used to getting to fluoresce are all man made, and it seems behaving very differently to biological materials.

I stand corrected (underwater at least... for stage I stand by my post!).

The stuff about LED construction and relative efficiency stands though.
 
Very interesting.

I suspect because my background is stage lighting, where we generally are looking for fluorescence ONLY (blacklight scenes). If we used blue light you would be able to see the performers, not just the puppets.
Plus the materials I'm used to getting to fluoresce are all man made, and it seems behaving very differently to biological materials.

I stand corrected (underwater at least... for stage I stand by my post!).

The stuff about LED construction and relative efficiency stands though.
Are your stage Black Lights UVA or B or C? What frequency are they?
 
Are your stage Black Lights UVA or B or C? What frequency are they?

Good question. They just came in a box marked UV... Not kidding, no idea what spec. Mostly we would use 'UV' florescent tubes, often with 'UV cannons'. And moving lights often have a colour filter that is a UV pass-through... Although I stopped that stuff about 10 years ago, just before everything started going LED

Doing some googling I suspect that the stage UV stuff is actually in the 'near UV' spectrum, not 'true' UV. And those of us in the stage lighting world go around calling ~450nm 'UV', when its not actually that. Not technically at least.
Which is fascinating, and lines up with the bio-fluorescence data. It seems semantics over technical accuracy was my error!
 
Good question. They just came in a box marked UV... Not kidding, no idea what spec. Mostly we would use 'UV' florescent tubes, often with 'UV cannons'. And moving lights often have a colour filter that is a UV pass-through... Although I stopped that stuff about 10 years ago, just before everything started going LED

Doing some googling I suspect that the stage UV stuff is actually in the 'near UV' spectrum, not 'true' UV. And those of us in the stage lighting world go around calling ~450nm 'UV', when its not actually that. Not technically at least.
Which is fascinating, and lines up with the bio-fluorescence data. It seems semantics over technical accuracy was my error!
Interesting. Thanks.
 
It's more visible than other colors in hazy grey foggy conditions off the English coast.
More visible than (fluorescent) yellow or orange?

Color me sceptical.
 
The claims; oh, the claims:

"Negative Ions refresh, invigorate and increase alertness. The force of moisture through flow tube crushes water molecules which then attach to oxygen molecules to create negative ions. This generates 7000-8000 pcs/cc with each breath. Similar to levels produced by waterfalls and forests. Every dive should feel this great!"

I have one of these. It works great. No dry mouth.
But is it because of the negative ions and the crushed water molecules?

That's the biggest load of unscientific crap I've read since that time I inadvertently wandered into Gwyneth Paltrow's webshop. That's 15 minutes of my life I'll never get back.
 
What if there is a system failure and it takes you up, blowing the safety stop?
I'd rather blow my safety stop than drown.

OTOH, that device looks like a very good tool for causing an embolism. So I think I'll pass.
 
My dive old computer had a audible alarms. I had no idea for about 5 years. I never dive with my hearing aids. My buddies never mentioned it.
My current dive computer has audible alarms. Neither I nor my buddy ever hear them, because we're wearing 5-10mm neoprene hoods.

Regardless of the fact that I have a hearing impairment.
 
But is it because of the negative ions and the crushed water molecules?

That's the biggest load of unscientific crap I've read since that time I inadvertently wandered into Gwyneth Paltrow's webshop. That's 15 minutes of my life I'll never get back.

[Mod edit]

Christmas is but a couple weeks away. Remember that “If you feel like it’s [the eggiweg's] been drained of energy, recharge it in the full moon just the way you would a crystal . . ."
 

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OTOH, that device looks like a very good tool for causing an embolism. So I think I'll pass.

Eh, embolism schmembolism . . .
 
https://www.shearwater.com/products/peregrine/

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