How to Read a Wholesale Lamp Line Sheet: The Fields Buyers Should Check First

Most buyers read a wholesale line sheet the way they read a retail listing: look at the picture, find the price, move on. That works when you are buying one lamp for yourself. It does not work when you are committing a quarter of shelf space or a hundred guest rooms to a model you have never held. The useful information on a line sheet is almost never the photograph. It is the unglamorous fields underneath it, and equally the ones that are absent.

What a line sheet is for, and what it is not

A catalogue sells. A line sheet specifies. The distinction matters because the two documents optimise for different things. Catalogue pages are laid out to make a product desirable, which means photography, lifestyle language and a price presented without context. Line sheets exist to remove ambiguity from a transaction, which means dimensions, materials, electrical ratings, carton quantities and the exact configuration that ships.

When a supplier sends a catalogue in place of a line sheet, they are not necessarily being evasive. They are revealing who they think their default customer is, and usually that customer buys one unit and never reorders. A programme buyer needs different fields, and the willingness to produce them is a reasonable early signal about how the relationship will run.

The fields that decide whether a programme works

Notice that the retail price does not appear in that list. It matters commercially, but it is not a specification, and treating it as one is how buyers end up comparing two products that were never the same product.

• Model code and finish codes, listed separately. If the finish is folded into the model number, replenishment breaks the first time a colour is discontinued.
• Assembled dimensions including the shade, plus the collapsed or carton dimensions. These are two different numbers and they drive two different costs.
• Shade material, shape and fitting type. A spider fitment and a clip fitment are not interchangeable, and replacements are ordered by the fitment, not by the look.
• Electrical ratings: input voltage and frequency, socket type, maximum wattage, and whether a bulb is included.
• Switch or control type, and where it sits on the cord or the body. This is a guest-facing detail that generates complaints more often than it generates praise.
• Cord length and plug type. Both are specification items rather than afterthoughts.
• Carton quantity, carton dimensions and gross weight. These three numbers determine freight cost per unit landed.
• Country of origin, for marking and for duty treatment.

The gaps that cost the most

The most expensive omission is usually carton data. A unit price that looks competitive can lose its advantage once freight is allocated, because lamp cartons are long and light, and are therefore priced on dimensional weight rather than actual weight. If the line sheet gives a unit price and no carton dimensions, the comparison is not yet possible regardless of how good that price looks.

The second most expensive omission is the finish code structure. A programme that spans three years will need to reorder into an existing installed base, and that reorder has to match what is already in the rooms. If a supplier cannot tell you which finish code corresponds to the units you bought in year one, replenishment becomes a visual mismatch problem on arrival.

The third is the maximum wattage marking and the socket rating. These are not marketing numbers. They determine whether the fixture is operated within the conditions it was evaluated under, and they are among the first things an inspector or a risk manager will check.

Reading two line sheets against each other

Create one row per field and one column per supplier, then fill it in from the documents themselves rather than from memory. Where a field is blank, write the word missing instead of leaving the cell empty, because an empty cell tends to be read later as not applicable. A sheet with three missing cells and a sheet with three empty cells look identical after a week, and they do not mean the same thing.

Then look at which fields are missing, not merely how many. A supplier missing carton data has a different problem from one missing finish codes. The first is usually fixable with an email, while the second suggests the supplier has not had to support a replenishment before.

This is the same discipline described in How to Evaluate a Lamp Supplier Before You Commit, applied to the document rather than the company. It also connects directly to Writing an RFQ That Gets a Real Quote: The Information Lamp Suppliers Actually Need, because a good RFQ is mostly a list of the fields you intend to compare.

Frequently asked questions

What is the difference between a line sheet and a spec sheet?

A line sheet describes the commercial offering: models, finishes, minimums, packaging and pricing structure. A spec sheet describes one product in technical detail. A programme buyer usually needs both, and they should agree with each other.

Should I ask for carton data before or after pricing?

Before. Landed cost per unit depends on carton dimensions and gross weight, so asking afterwards means the first round of quotes cannot be compared on equal terms.

What if a supplier will not provide finish codes?

Treat it as a replenishment risk rather than a documentation gap. If the codes do not exist, a reorder in year three cannot be guaranteed to match the units already installed.