Opalescent, textured and transparent glass transmit and scatter light differently, so one shade can look restrained by day and vivid at night.
Start with the problem, not the product photograph
For Why Tiffany glass changes when the lamp is switched on, separate what is visible, what the listing claims and what can actually be verified. Glass colour is only one part of the construction.
Photograph the proposed position straight on and from the side. Record the full dimensions, lampholder, bulb, connection method and the main task. A close product image rarely shows room scale, door movement or the angle from which a bare bulb becomes visible.
Three distinct decisions
1. Decide the job before the style
Decide whether the lamp is primarily a lit artwork, a mood light or a source of useful task light; each priority leads to a different bulb choice.
Keep this evidence: write the main task and the one constraint that could rule the fitting out.
2. Measure the real fitting envelope
Note bulb lumens, kelvin, shape and distance from the glass so two photographs can be compared meaningfully.
Keep this evidence: record every dimension from one named reference point and photograph the tape measure in place.
3. Test the result from normal positions
Take paired photographs from a fixed viewpoint—off in midday light and on during a normal evening—with the camera exposure held as consistently as possible.
Keep this evidence: repeat the check by day and after dark, using the bulb and furniture layout you expect to keep.
Compare two models without being misled by the image
| Evidence | Why it matters | Practical check |
|---|---|---|
| Complete dimensions and weight | Glass, base, chain and canopy may sit outside the highlighted shade dimension. | Dimensioned sketch, total weight and a 1:1 mock-up |
| Connection and bulb | Voltage, plug or fixed connection, bulb count, cap, lumens, shape and maximum wattage affect suitability. | Rating label, current product page and trial with the intended compatible LED |
| Switched off and on | Dense stained glass can glow strongly at night yet read much darker in daylight. | Compare from the same angle in the actual room |
A real TiffanyLight.co.nz product as the worked case
30 cm Baroque-style stained-glass pendant
A compact 30 cm pendant used to test table margins, hanging height and the difference between shade diameter and total suspended size.
This model demonstrates the method; it is not an automatic recommendation. Draw its complete dimensions, verify the current electrical specification and test the proposed light in the real room. Product details can change, so check the live page before buying.
Confirm on the product page: total dimensions, weight, voltage and connection, lampholder, maximum wattage, included parts and installation conditions.
Practical New Zealand home scenario
Compare 30 cm Baroque-style stained-glass pendant with a visually similar model using three columns: visible construction, technical data and claimed origin. Inspect crown, solder and rim; read dimensions and electrical markings; keep provenance claims outside the build-quality score. The result is an auditable comparison rather than an impression.
Common mistakes
- Calling a lamp original because its motif is familiar.
- Counting glass pieces while ignoring the rim and load path.
- Judging colour only when the lamp is switched on.
Final checklist
- Material and construction are documented.
- Glass and joints have been seen off and on.
- Stability and electrical data are checked.
- Style and provenance remain separate.
- Uncertainty is stated clearly.
Record sheet: model, complete dimensions, total weight, voltage and connection, lampholder, chosen LED, position, mock-up photograph and check date. The current product information and maker’s instructions take priority over general guidance.
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