Green light won't 'excite' glow powder?

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Orion

Orion

Flashlight Enthusiast
Joined
Jun 27, 2002
Messages
1,613
Location
Missouri
Green light won\'t \'excite\' glow powder?

I put some glow powder laden fingernail polish on the base of a Hotlips, which has a cyan [more greenish] on top. I turned it on, . . . . . . . . . .barely glows. Even after 30 seconds of having the light on. Only a few seconds of a UV 5mm LED caused it go glow.

Anyone know the reason for this? /ubbthreads/images/graemlins/confused.gif /ubbthreads/images/graemlins/icon3.gif
 
gregw

gregw

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Joined
Jun 7, 2004
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1,511
Location
Hong Kong
Re: Green light won\'t \'excite\' glow powder?

Glow powder responds best to light sources rich in UV.. See this FAQ.
 
S

Steelwolf

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Joined
Feb 6, 2001
Messages
1,208
Location
Perth, Western Australia
Re: Green light won\'t \'excite\' glow powder?

I think red light won't excite glow powder either. For best response from glow powder, go with blue, white or UV lights.
 
L

Lux Luthor

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Joined
Nov 10, 2000
Messages
1,944
Location
Connecticut
Re: Green light won\'t \'excite\' glow powder?

You need a wavelength of light shorter than the color of the glow powder.
 
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