Photography
How to photograph
a lamp that is on.
Why the lit shot is hard, how studios do it, and what it costs per product.
Every lighting shop eventually tries this and most give up after the first product. The reason is not skill. It is that a lit lamp is one of the harder things a camera can be asked to do.
Why it is hard
A lit bulb and the wall behind it can be separated by more brightness than a sensor can record in one frame. Expose for the room and the bulb burns to a white blob with no shape. Expose for the bulb and the room goes black, so the thing you were demonstrating — what the light does to a space — is gone.
That gap is called dynamic range, and it is why a phone photo of a lamp at night never looks like what you saw.
How studios actually do it
The professional answer is two exposures and a blend:
- Black out the room. Any daylight leaking in will fight the lamp and you cannot correct it afterwards.
- Camera on a tripod, manual everything. The two frames have to line up to the pixel, so nothing may move — not focus, not zoom, not the white balance.
- One frame exposed for the room, with the lamp off and a soft fill so the shape and material read.
- One frame exposed for the lamp on, so the bulb keeps its shape and the pool of light on the wall is real.
- Blend the two by hand, usually masking the bulb and the immediate glow from the second frame into the first.
Done well it is indistinguishable from a single honest photograph, because physically that is what it is: the same scene, the same camera, two moments.
What it costs
Roughly half a studio day per product once you include the blackout, the setup, metering both exposures and the retouch. For a catalogue of forty lamps that is not a photo shoot, it is a project with a budget and a schedule — which is exactly why most shops have the studio shot and not the lit one.
The framing rules that matter more than the lighting
A catalogue reads as professional because of sameness, not because of any single frame. Decide these once and never vary them:
- One background. Same wall, same paint, same distance from it. Different greys across a grid is the most common tell of an amateur catalogue.
- One camera height, usually at the middle of the product.
- One distance and one focal length. Changing focal length changes how the product's proportions read, and a grid where proportions wander looks wrong without the viewer knowing why.
- Room at the edges. Leave space around the product: you will crop later for a square grid, a story and a hero banner, and you cannot add background that was never there.
- One scale reference per product, shot separately. The lamp next to a chair or a door answers «will it be too big?», which is the question behind half of lighting returns.
If you change anything mid-catalogue — a new wall, a new lens — re-shoot the products you already did. Two consistent halves look worse than one consistent whole, because the seam is visible in the grid.
The shortcut, and its honest limits
The alternative to re-shooting is generating the night version from the daytime photograph you already have. The framing, the product and the shadows stay yours; what changes is the light.
What it is good at: giving a whole catalogue a consistent lit version for a few cents a photo instead of a studio day a product, and doing it without anyone touching your existing images.
What it is not: a replacement for a hero shot of your flagship product. If one lamp carries the brand, photograph that one properly. Generate the other thirty-nine.
This is what LightsOff does, and it is worth being plain about the trade-off rather than pretending there is not one.
Every lamp in your shop, lit
LightsOff puts a switch on your storefront. The shopper flips it, your shop dims, and every lamp comes on in its own night photograph — generated from the daytime photo you already have, without touching your theme.
See how it works