The first-sale clock, not the lantern
A lighthouse marks a line. It does not haul the boat. Featured lamps and new banners are not the same as a shorter time to first transfer.

Our house is named for a lamp, which tempts people to think we sell brightness. We do not. A lighthouse tells you where the rocks are. The boat still has to move.
On a marketplace, the lantern is featured placement, a new banner, a weekend campaign. The movement we measure is the first-sale clock: days from a listing’s first public appearance to its first completed transfer in the sample. If the clock does not shorten after you turn lamps up, you bought light, not liquidity.
We have sat with houses that doubled featured spend in a category whose buyers were already chatting and then refusing the rate. The lamp made the stall busier to look at. The clock did not move. The working session was uncomfortable in a useful way: the room stopped arguing about visibility and started arguing about whether that aisle still belonged on the public floor.
There is a Malaysian picture we use carefully, because it can become a speech. Night markets in Selangor are thick with lamps. Walkers still pass some stalls without stopping. The stallholder who adds another bulb does not always add buyers. Sometimes the aisle itself is wrong for the goods.
If you take nothing else from this note, take the clock. Write down what a transfer is. Measure it in the window. Treat lamps as a later decision, after the map exists.