[Adampatrick]

Hi,
I have rescently been given a box of 15watt blacklight bulbs.

I was wondering if anyone knew how many I would need to make
an A3 sized exposure unit, or if it would just be easierto use another type of light source all together.

Thanks.

 

[NoXid]

Are they black/purple in color (when not turned on)? Those are not really the ones you want. If they are whiteish looking, then they are the right type.

How long are they? Comfortably long enough to span the full width of your screens?

I used 4, 40w (T12, I think?) tubes. It worked, but was underpowered. Even if you have a dozen free 15w tubes, you'll need to buy fixtures for them all. Better, I think, to go with fewer but more powerful tubes. I would do maybe 7 or 8 x 40w, if using tubes again.

 

[Adampatrick]

Thank you for your reply.
From what you have said i dont think they will be suitable.

They are a purple/blackish in colour when turned off

Also they arnt tubes but actual bulbs.

I was just hoping I coulds use them as i had them and didnt want to have them sitting around.

Thank you for your advice.

 

[NoXid]

Thank you for your reply.
From what you have said i dont think they will be suitable.

They are a purple/blackish in colour when turned off

Also they arnt tubes but actual bulbs.

I was just hoping I coulds use them as i had them and didnt want to have them sitting around.

Thank you for your advice.

Time to prowl the flea markets for vintage blacklight posters