# 📐 L2 Spec — Widefield Fluorescence Mismatch-Only Spec
**ID:** `L2-001-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-001`](/artifact/l1/L1-001)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.3 · **Delta tier:** 5
> **⛓ On-chain block:** 41554156
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 128 – 4096 |
| W | px | 128 – 4096 |
| Na | — | 0.4 – 1.49 |
| Dz nm | nm | 0.0 – 1500.0 |
| Pixel nm | nm | 30 – 200 |
| Sigma bg | — | 0.0 – 0.1 |
| Emission nm | nm | 400 – 800 |
| Peak photons | photons | 50 – 10000 |
## 2. Tolerance (ε)
**Type:** `fn`
```
22.0 + 2.0 * log2(H / 128) + 1.5 * log10(peak_photons / 50)
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.3 |
| Delta tier | 5 |
## 4. Fingerprint
`aebb625034ea8a1a29af88ccd1ca84ce717af0d54b43a479f4c9d5e15efcb57f`
## 5. On-chain Registration
- **Chain hash:** `0x5fa68ef7b055886a4473c9259c5480c867823e358561787be0722b48889da18a`
- **Chain tx hash:** `0x13190d4e1cfd97eaf8d8355fc2873738ca0a0158fba5059dd8f905fe369168be`
- **Chain block:** `41554156`
---
## File Mapping
This bundle consists of: `L2-001-001.md`, `L2-001-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-001-001.md` | Source of truth — edit this | Human or LLM |
| `L2-001-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-001-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._