Print lamp ID labels on the Brother QL-820NWB

label_printer.py renders a DK-11221 23x23 mm label (QR code linking
to the lamp's buildfor.life page plus the ID) and sends it over the
network backend (brother-ql-next). The station prints two after each
successful measurement, one for the box and one for the lamp; printer
failures never lose a run, and any lamp can be reprinted with
uv run label_printer.py <ID>. Printer address via HPCS_LABEL_PRINTER
or --printer.

lamp_station.py

@@ -31,6 +31,10 @@ supports unbranded lamps without any barcode.
        website picks it up automatically (data-driven device list plus the
        auto-bump deploy); an .md page in the web repo is only ever needed
        for photos, where-to-buy links, or notes.
+    6. Two ID labels (QR to the lamp's page + the ID, DK-11221 23x23 mm)
+       print on the Brother QL-820NWB: one for the box, one for the lamp.
+       Configure the printer via HPCS_LABEL_PRINTER or --printer; reprint
+       any lamp later with `uv run label_printer.py L0006`.
 
 Usage:
     uv run lamp_station.py                      # defaults below
@@ -40,6 +44,7 @@ Usage:
 
 import argparse
 import json
+import os
 import re
 import subprocess
 import sys
@@ -304,6 +309,20 @@ def measure_one(new_id, ean, lamps, args, data_repo, existing_id=None):
     print("  The lamp publishes automatically (auto-bump deploy); add an .md under")
     print("  src/content/comparisons/lamps/ only for photos, buy links, or notes.")
 
+    # Two ID labels on the QL-820NWB: one for the box, one for the lamp.
+    if not args.no_labels:
+        if args.printer:
+            try:
+                from label_printer import print_labels
+                print_labels(lamp_id, args.printer, copies=2)
+                print(f"  Printed 2 ID labels for {lamp_id}.")
+            except Exception as e:  # noqa: BLE001 — a printer problem must not lose the run
+                print(f"  Label printing failed ({e}); reprint later with:")
+                print(f"    uv run label_printer.py {lamp_id}")
+        else:
+            print(f"  (no label printer configured; set HPCS_LABEL_PRINTER or use --printer,")
+            print(f"   reprint later with: uv run label_printer.py {lamp_id})")
+
 
 def main():
     parser = argparse.ArgumentParser(description="Barcode-driven lamp measurement station")
@@ -320,6 +339,11 @@ def main():
                         help="Write the bundle but skip git entirely")
     parser.add_argument("--no-push", action="store_true",
                         help="Commit locally but do not push")
+    parser.add_argument("--printer", default=os.environ.get("HPCS_LABEL_PRINTER", ""),
+                        help="QL-820NWB address, e.g. tcp://192.168.1.50 "
+                             "(default: HPCS_LABEL_PRINTER env)")
+    parser.add_argument("--no-labels", action="store_true",
+                        help="Skip printing the two ID labels after each lamp")
     args = parser.parse_args()
 
     data_repo = Path(args.data_repo)