Material lighting issue with Fireworks SKU 4099
So, I bought "Fireworks" this morning and quickly saw it only renders in black. F1 scene render is what I get. Capture 2 screenshot is Studio 6 as it was at render. The prop should be green. The Preset materials were applied as stated by the maker. What am I missing here to light the prop?

Comments
It's a very old product made for 3DL and Poser, there's a good chance you will need to adjust the materials if you want to use them with Iray (for example adding emission)
Which?
https://www.daz3d.com/fireworks
https://www.daz3d.com/fireworks_19727
I'm guesing it's the first, from your mention of materials. As Leana says, this is an older product so it will have 3Delight materials. I can't decide from the product page, and the readme is not there, but I suspect it has a sky dome which wil block all external light (Iray environment map and any distant lights). You will probbaly need to get rid of that, if present, and apply the ambient or diffuse colour maps to the emission colour property of the iray shader; you may also find that the diffuse colour is black, which you may need to change to white.