The most costly problems in lighting orders were discovered only after the containers had been shipped. Pre-shipment inspection is the lowest cost control point...
A lamp arrives with CE mark, ENEC certificate and EPREL registration, and many buyers will default to these three components. They're not close, and figuring ou...
Comparing the quotations of two lighting suppliers is rarely as simple as two numbers. The lowest unit price in bidding often corresponds to the highest total c...
The output of two lamps made based on the same LED device may differ significantly after five years. The difference is almost never in the chip itself, but in t...
A lamp could pass all the optical and protective tests in the catalog, but still failed during the first rainy season. The specification that determines this ma...
Buying lamps is the end point of lighting design, not the starting point. The beam angle and spacing are where most of the project's value is created or lost, a...
Each outdoor lighting parameter table is printed with an IP rating, and many are also printed with an IK rating, but few buyers have seen what these tests do. O...
Lumens, lux, candela, and light efficiency are four completely different measurements; confusing them is the most common reason why a buyer finally gets a light...
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