Author Topic: Discontinuation of MV Black Lights  (Read 10486 times)
mrboojay
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Discontinuation of MV Black Lights « on: December 24, 2012, 06:41:13 PM » Author: mrboojay
Have they/will they discontinue MV black lights? Also are they the only type of HID that can work as a good black light (I don't think HPS or LPS would do very well though)?
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dor123
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Re: Discontinuation of MV Black Lights « Reply #1 on: December 25, 2012, 05:40:49 AM » Author: dor123
The blacklight mercury lamps, are intended for blacklight effects at stages, as they produces a huge amount of UVA, compared to blacklight fluorescents, and they are a point UV sources (Phosphorless, only wood glass, 365.5nm mercury UVA spectral line).
Blacklight fluorescent lamps, are used for fluorescence effects inside rooms or inside small areas, identification of fake bills, and minerals analysis, and produces their UVA by phosphors. Blacklight CFLs are retrofits for "blacklight" incandescents, which have zero (The incandescents) UV radiation and are very hot and severally overdriven (50 hours life in the worst case). So blacklight CFLs should be for sure a real green solution for blacklight incandescent.
UV LEDs, are used for money identification of fake bills only. They can't replaces blacklight MVs in any ways.
So banning the MV black lights is meaningless, as they are the most efficient and powerful UVA sources. They don't intended to produces visible light.
Each blacklight lightsources have its own applications.
« Last Edit: December 25, 2012, 05:43:10 AM by dor123 » Logged

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Re: Discontinuation of MV Black Lights « Reply #2 on: December 25, 2012, 11:10:01 AM » Author: Ash
They are less efficient than BLB fluorescent and probably than LED as well

But if they are concerned with the very few BLB mercury lamps in use (its not like they are lighting up km's of roads) then they are really retarded
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LegacyLighting
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Re: Discontinuation of MV Black Lights « Reply #3 on: December 25, 2012, 06:42:24 PM » Author: LegacyLighting
@ Boojay - Good question, the EU has done their best to eliminate every 'toxic' lamp from manufacture.

@ Dor - wow I didn't know UV LED's even existed - very interesting.

@ Ash yes good point you make - surely there wouldn't be that many BLB MV in use.
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Re: Discontinuation of MV Black Lights « Reply #4 on: December 26, 2012, 03:05:56 AM » Author: dor123
Blake: Here are the near UV LEDs of my UV flashlight.
Here is my UV flashlight turned off.
« Last Edit: December 26, 2012, 03:08:07 AM by dor123 » Logged

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Re: Discontinuation of MV Black Lights « Reply #5 on: December 26, 2012, 05:27:10 AM » Author: LegacyLighting
Dor

Thank you for taking the trouble to post the links. It is very interesting how technology is moving forward all the time.

Does your Hostel celebrate Christmas? I hope you enjoyed some time with your friends and family.


kind regards
Blake
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dor123
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Re: Discontinuation of MV Black Lights « Reply #6 on: December 26, 2012, 08:04:21 AM » Author: dor123
My hostel is a jewish institution, so it isn't celebrate Christmas. It celebrated Hannuka. Generally, the main religion in Israel is judaism, and real Christmas and New Year celebrations, are relatively new activities here, that began only in the recent years, at least at the beginning of 2000's.
When I was a child and a teen, Christmas and New Year, wasn't celebrated in Israel at all.
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Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

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I lives in Israel, which is a 220-240V, 50hz country.

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Re: Discontinuation of MV Black Lights « Reply #7 on: December 26, 2012, 08:22:07 AM » Author: LegacyLighting
Hi Dor

Yes well that makes sense - very interesting to have that perspective. Isn't it intersting how we are all of different backgrounds and cultures, but have a common interest in lighting. We are not so different after all  :)

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Re: Discontinuation of MV Black Lights « Reply #8 on: December 26, 2012, 09:45:36 AM » Author: dor123
Here is the beam of my near UV LED flashlight.
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Re: Discontinuation of MV Black Lights « Reply #9 on: December 26, 2012, 11:40:59 AM » Author: Ash
The EU dont eliminate toxic lamps, fluorescents still have phosphors in them and cosmos still have mercury. They do their best to kill the SOX though, and the SOX is about the only non-toxic discharge lamp

Our family do celebrate the new year, not actually christmas but it looks about the same, sometimes with tree (when i do bother to assemble/disassemble the plastic tree) and everything
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Re: Discontinuation of MV Black Lights « Reply #10 on: January 02, 2013, 02:35:59 PM » Author: BG101
I hope they don't discontinue them, it wouldn't make any sense. Especially as I'm still yet to acquire one!

I'd be tempted to put a second MV fixture up in my back yard, a bog-standard 80W floodlight as these are cheap, and put a blacklight bulb in for parties, barbeques etc.. This would create a great effect alongside the existing clear mercury lantern!


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Re: Discontinuation of MV Black Lights « Reply #11 on: January 03, 2013, 11:14:34 AM » Author: Ash
It is great, i did this wth the 1KW linear halogen flood that i modified to 125w mercury and used with blacklight lamp

One issue though - in my floodlight when the glass is closed it drops a lot of the UV output - have to run it without the glass when using the UV merc in it
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BG101
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Re: Discontinuation of MV Black Lights « Reply #12 on: January 03, 2013, 12:56:30 PM » Author: BG101
Good point, I hadn't thought of that. Maybe a shovel-type floodlight would be better in that case as it should protect the bulb from the weather better than an open fitting designed to be operated with a cover.


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Re: Discontinuation of MV Black Lights « Reply #13 on: January 03, 2013, 03:16:15 PM » Author: Ash
As long as it protects the lamp well. A blacklight merc is not very easy to get, you dont want that to get broken due to weather (or thermal shock from being powered in bad weather). I am not even sure if the BLB glass is as resistant to thermal shock as standard mercury lamp

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Re: Discontinuation of MV Black Lights « Reply #14 on: January 03, 2013, 04:09:09 PM » Author: dor123
A wood glass, is a glass, but with higher iron and nikel doping, that makes it almost opaque to visible light, except for the UVA and IR radiation.
A wood glass don't transparet shorter UV wavelengths than regular hard and soft glasses.
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

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