The visible light surface matters
The apparent size of a light source from the subject’s position influences shadow edges. A large nearby diffusion surface can produce softer transitions. A small or distant light source often produces harder shadows.
Consider the relationship between light surface, distance and subject, rather than looking only at the dimensions of the lamp.
Shiny products reflect their surroundings
Metal, glass and glossy finishes often show the light source and parts of the room in reflections. Adjust the lighting surface, diffusion and camera position deliberately.
A broad reflection can explain a shape; a clipped highlight can hide detail. Change one factor at a time and compare the result.
Choose how to fill or deepen shadows
A bright reflector on the shadow side can soften contrast. A dark flag can help separate an edge.
Neither is automatically better. The product and intended image determine which approach is useful.
Check colour and exposure
Keep lighting and white balance consistent across a series. Check bright areas, dark detail and the intended product colour on a suitable display.
A reference target can help alignment, but does not replace checking the complete capture-to-output chain.
Record the setup that worked
Photograph the set from several directions. Record distances, lighting output, modifiers, camera settings and processing settings.
Keep an approved reference image so the next person knows what the result should look like.