How to upszie?
for instant, for this product you use a 250ws strobes with 16"x16" lightbox, to get the same lighting effect when you shoot a product have double the size, so you need to use a light box double size, eg 32"x32" lightbox.
and since you have a bigger lightbox, you also need to double the power of your light, so need to use 500ws strobe instead.
and if you have much larger products, you can also place two light side by side to get the power you need.
Remember, inverse-square law applies on lighting,