Yeah, but she doesn't have a spectroscope, and wouldn't recognize the identifying emission lines if she did. I tried using mine on the bulb images she emailed me, but all I could see was a red, blue, and green emission line (joking of course). -Dan Heim On 3/29/2013 10:10 AM, phxjeffx@xxxxxxx wrote: > Hi Dan, > > A hand held spectroscope would work fine. These can be purchased for under > $2. They can easily show mercury lines or sodium. > > > Jeff > > Hopkins Phoenix Observatory > (187283) > Counting Photons > Phoenix, Arizona > www.hposoft.com/Astro/astro.html > > -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.