Maybe this is the wrong place to post this but IDK.

I have an unbranded lamp labeled 400W Diazo. This is meant for making what are essentially blueprints but with a white background and blue lines instead of the other way around. This lamp is used, and running it on my plain 400W CWA ballast yields only cycling behavior. I hear that some of these lamps are meant to be run on 400W CWA ballasts with upgraded capacitors to actually run on 500W, and I tried it and it does run continuously with an extra 2.5uF added to the capacitance. I don’t know if it is meant to run like that or not. This lamp almost certainly emits near-UV/blacklight, may or may not emit UV A and B, but likely not UV C. It is classic BT37 shape and mogul base. You can see pictures of it here:

https://www.lighting-gallery.net/gallery/displayimage.php?album=8350&pos=2&pid=243106

https://www.lighting-gallery.net/gallery/displayimage.php?album=8350&pos=1&pid=243119

This was my very first HID lamp. I saw it at an old store, and I bought it for very cheap. I thought it would just be a normal white 400W lamp, so I eventually came to Lighting Gallery to find out more about HID lamps. This led me to buy a 400W CWA ballast and try to power it. Long story short, this strange lamp is what got me into HID lighting and brought me to Lighting Gallery.

I know I am lucky for my very first HID lamp to be a fairly rare one. Should I keep it for the sentimental value? Just because it is rare? I am definitely going to hold on to it a little longer (at least until I graduate high school and move out) because I do have the space to store it right now, but I might not have much space for it later. If I were to get rid of it, I would probably give it away free to someone young just starting out like I was/am, or for a reasonable trade to someone who has more.

What do you all think?
What is your motivation for selling or trading?
What are these things worth?
 

This is probably a gallium filled MH lamp and is certainly somewhat rare. The color and spectrum and diffused milky look of the arc is definitely interesting. What is the reason to get rid of it?

If you are saying you don't have a space for a single 400W BT lamp, you are sure in a wrong kind of hobby, haha )

This is probably a gallium filled MH lamp and is certainly somewhat rare. The color and spectrum and diffused milky look of the arc is definitely interesting. What is the reason to get rid of it?

If you are saying you don't have a space for a single 400W BT lamp, you are sure in a wrong kind of hobby, haha )

Space isn’t as much of a concern as much as the fact that I just have no use for it. I am all for collecting cool stuff, but it isn’t that cool if you can’t actually do anything with it (in my opinion).

Personally I think gallium MH lamps are cool and collected some unusual types. You mileage may vary, of course)