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General => Off-Topic => Topic started by: micole66 on April 07, 2018, 04:09:21 AM

Title: This green light
Post by: micole66 on April 07, 2018, 04:09:21 AM

What lamp is this green light?? Mercury vapor, metal halide or high pressure sodium??

Title: Re: This green light
Post by: dor123 on April 07, 2018, 04:47:24 AM

The quality is too low for me to detect which lamp it is. Older HID lanterns have mercury vapor lamps. Metal halide lamps inside road and street lanterns is something relatively new thing. If this lantern is very old, there is a chance that it is a mercury vapor lamp.

Title: Re: This green light
Post by: F96T12 DD VHO on April 07, 2018, 12:14:55 PM

If you are near the fixture try this:
Lock your eye to one side of your eye socket and pan your head in the opposite direction, this causes you to see the strobe of any light source that has a flicker

That should tell you that it's at least HID, if not then IDK

Title: Re: This green light
Post by: Mercurylamps on April 08, 2018, 01:58:51 AM

Hard to say from the photo, the green tinge looks like mercury to me.

Title: Re: This green light
Post by: HomeBrewLamps on April 09, 2018, 12:51:08 AM

I'm 99% sure that is Mercury. I've never noticed that specific shade of green when photographing MH lamps (even old ones) The shade here almost reminds me of when I was trying to photograph a /C phosphored lamp...