body {
font-family: "Inter", "Noto Sans SC", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
/* 移除了原有的外边距 */
background-color: #f9f9f9;
}
h1 {
text-align: center;
color: #333;
}
table {
width: 100%;
border-collapse: collapse;
margin-top: 20px;
box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
th, td {
border: 1px solid #ddd;
padding: 12px;
text-align: left;
}
th {
background-color: #4CAF50;
color: white;
}
tr:nth-child(even) {
background-color: #f2f2f2;
}
a {
color: #0645ad;
text-decoration: none;
}
a:hover {
text-decoration: underline;
}

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Photometric Files: The Starting Point of Every Layout

IES (.ies) and EULUMDAT (.ldt) files describe how a luminaire distributes light and are the direct input to lighting simulation. Two habits keep simulations honest: use the file that matches the ordered CCT and output package (a 5000 K file will not predict a 4000 K install), and record the file’s test date in the project file — photometry is re-tested when optics or drivers change, and layout software will not warn you about a stale file.

Matching the Document to the Project Phase

Phase Documents to Pull Decisions They Support
Concept / budgeting Spec sheet, photometric file Fixture count, rough illuminance and LPD check
Design development Full spec sheet, IES file, installation guide Layout in DIALux/AGi32, mounting details, wiring
Submittal / permit Certificates, test reports, spec sheet Code compliance, utility rebate applications
Commissioning Installation guide, control wiring notes Aiming, sensor setup, dimming curve verification

Working Through a Simulation Honestly

  1. Import the IES file and set the maintenance factor to your cleaning cycle (0.8–0.9 for industrial, 0.9 for clean commercial)
  2. Check uniformity (min/average) against the task requirement — industrial task planes typically need ≥ 0.4, sports and security applications more
  3. Compare installed LPD against the applicable energy code with the method in our lighting power density guide
  4. Validate against a measured deployment when one exists — the high-bay factory case and stadium upgrade case publish before/after photometric measurements you can benchmark against

Requesting Files Not Yet Posted

Photometry for made-to-order configurations — custom CCT, asymmetric optics, emergency variants — is generated on request. Send the configuration code through the contact form; typical turnaround is three business days for a standard-configuration IES file and two weeks for a new custom optic that requires a lab run.