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FT-04.md
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| 1 | # FT-04: Lighting |
| 2 | |
| 3 | <!-- Generated from field-tests/suite.json by tools/field_tests.py. Edit the JSON, not this file. --> |
| 4 | |
| 5 | **Category:** Light · **Time:** about 15 minutes · **Run it and see results:** [https://openckey.org/tests/test?id=FT-04](https://openckey.org/tests/test?id=FT-04) |
| 6 | |
| 7 | ## What it checks |
| 8 | |
| 9 | A printed CKey reads in daylight, ordinary indoor light, dim light and under a reflection. |
| 10 | |
| 11 | ## Why |
| 12 | |
| 13 | Low light adds noise and blur, warm light shifts colour, and glare washes out part of the code. The certification model includes noise and glare; this checks it against real rooms. |
| 14 | |
| 15 | ## Test codes |
| 16 | |
| 17 | Print or open the sheet at [https://openckey.org/tests/sheet?id=FT-04](https://openckey.org/tests/sheet?id=FT-04). It is drawn by the CKey web SDK from the values below. |
| 18 | |
| 19 | | Code | Size | Version | Level | Layout | Style | Holds | |
| 20 | |---|---|---|---|---|---|---| |
| 21 | | A | 2.0 in | smallest that fits | M | standard | plain | `https://openckey.org/t/FT04-A` | |
| 22 | |
| 23 | ## Set up |
| 24 | |
| 25 | 1. Print the test sheet at 100% scale; the code is 2.0 inches wide. |
| 26 | 2. Keep the phone about 25 cm from the sheet with the flash off. |
| 27 | |
| 28 | ## Steps |
| 29 | |
| 30 | 1. Try the code in each condition: outdoor daylight (not direct sun on the screen), ordinary indoor light, a dim room lit by one distant lamp, warm lamp light close by, and with a bright reflection crossing part of the code (glossy paper or a sheet protector under a lamp). |
| 31 | 2. Allow up to 5 seconds in each. |
| 32 | 3. Record whether it read, and optionally the light level from a light-meter app. |
| 33 | |
| 34 | ## What to record |
| 35 | |
| 36 | - **Read within 5 seconds**, boolean, required. For each of: Daylight, Indoor, Dim, Warm lamp, Reflection. |
| 37 | - **Light level, if measured** (lux), number, optional. For each of: Daylight, Indoor, Dim, Warm lamp, Reflection. |
| 38 | |
| 39 | Every report also records the device, operating system, reader and its version, and the printer or screen. |
| 40 | |
| 41 | ## How to grade it |
| 42 | |
| 43 | - **Pass:** It read in daylight, indoor, dim and warm light. |
| 44 | - **Partial:** It read in daylight and indoor light only. |
| 45 | - **Fail:** It did not read in ordinary indoor light. |
| 46 | |
| 47 | ## Report a result |
| 48 | |
| 49 | - On openckey.org: [https://openckey.org/tests/test?id=FT-04](https://openckey.org/tests/test?id=FT-04), with optional photos. |
| 50 | - On GitHub: [open a field-test report](https://github.com/clearkeysolutions/ckey/issues/new?template=field-test-report.yml&title=%5BFT-04%5D+) and choose FT-04. |
| 51 | |
| 52 | Both are published together at [https://openckey.org/tests](https://openckey.org/tests) and as JSON at [https://openckey.org/api/field/results](https://openckey.org/api/field/results). |