UV Box making gums

[Lani Doely]

Do you know the wavelength? Recently I got a new uv box which has 12 20watt uv bulbs and I'm trying to find the wavelength to compare it to another box I was using to make my gums as my exposures are different plus I pre-soaked on Hahnemule for the new box but I dont think that should make much of an an exposure difference. The person who made it for me doesn't know and I've tried contacting the people that make the bulbs to no avail. This is the info:

The manufacture is company called "SPEK Lighting". Made in Thailand.
Info on box lable;
20 watt
F20t12/350 BL, part #. Code #71803
Hg lamp containing Mercury.
Printed on bulb,,, G13, L=590mm,,, 0/= 38mm

Is the wavelength hidden in the info above?

My times in this new box are longer which is fine but I'd like to know as the times in the other box I was using were shorter and I believe that wavelength is 395nm or 365nm.

 

[gbroadbridge]

Do you know the wavelength?

Recently I got a new uv box which has 12 20watt uv bulbs and I'm trying to find the wavelength to compare it to another box I was using to make ;
20 watt
F20t12/350 BL, part #. Code #71803

It's 350nm as shown in the part number.

 

[Lani Doely]

Thank you!!! That’s what I was hoping but it says 350BL what does BL mean and why don’t they say 350nm?

 

[gbroadbridge]

Thank you!!! That’s what I was hoping but it says 350BL what does BL mean and why don’t they say 350nm?

BL == Blacklight as in Ultraviolet.

Most folks buy lamps for a particular purpose (such as bug zappers) rather than nominating a particular wavelength as we do for photographic emulsions so they don't care about it.

 

[Lani Doely]

Thank you again!