grabowski
c7d480bfcf
Directories rename from bare EANs to L0001..L0010 (measurement order). metrics.json gains an ean field, and a rated block with advertised values (flux, CCT, power, lifetime) where already documented, so the site can show advertised-vs-measured deltas. One EAN can now cover several lamp versions (variant field) and unbranded lamps need no barcode.
42 lines
2.3 KiB
Markdown
42 lines
2.3 KiB
Markdown
# comparison-data
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Raw measurement data behind [buildfor.life/comparisons](https://buildfor.life/comparisons).
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This repo is consumed by [buildfor_life_web](https://git.b4l.co.th/B4L/buildfor_life_web)
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as a git submodule at `apps/web/comparison-data`. At build time the site copies it to
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`/data/comparisons/`, where every file is both chart input and a raw download. Directory
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names are the keys the site's device pages reference in their `csv:` front matter, so
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renaming a directory here requires updating the matching page in the web repo.
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## Layout
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```
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lamps/<ID>/spd.csv SPD 380-1050 nm: wavelength_nm,value
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lamps/<ID>/tm30.csv ANSI/IES TM-30-18 per-hue-bin data (16 bins): Rcs, Rhs, Rf_h, ...
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lamps/<ID>/metrics.json Summary: TM-30 Rf/Rg, CRI Ra + R1-R15, CCT, flux, instrument metadata
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solar-charge-controllers/<device>.csv Efficiency sweep: set/measured Vin, Iin, Pin, Vout,
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Iout, Pout, eff_pct, heatsink and board temperature
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```
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Every lamp has an internal ID (`L0001`, `L0002`, ...) as its primary key, assigned in
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measurement order by `lamp_station.py`. The EAN barcode is optional metadata in
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`metrics.json` (`ean`): one barcode can cover several versions of a lamp (daylight and
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warm white sharing box art get distinct IDs and a `variant` field), unbranded lamps have
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no barcode at all, and EANs starting with 2 are retailer-internal codes that cannot be
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resolved publicly. `metrics.json` may also carry a `rated` block with the advertised
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values from the packaging (`Phi_lm`, `CCT_K`, `Power_W`, `Ra`, `lifetime_h`, `W_equiv`),
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keyed like their measured counterparts so consumers can render
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advertised-vs-measured comparisons.
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## Provenance
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- Lamps: HPCS-6500 integrating sphere, 230 V / 50 Hz, five consecutive readings averaged
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after stabilization. Instrument driver and TM-30 tooling:
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[HPCS6500-py](https://git.b4l.co.th/B4L/HPCS6500-py). Procedure:
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[lamp test procedure](https://buildfor.life/docs/tooling/lamp-test-procedure/).
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- Solar charge controllers: automated MPPT testbench sweeps. Procedure:
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see the linked test procedure on the comparison page.
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Data is published as measured; files are never edited after the fact. Corrections happen
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by re-measuring and replacing the whole device directory in one commit.
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