# 📐 L2 Spec — Fluorescence Lifetime Imaging Microscopy (FLIM) Mismatch-Only Spec
**ID:** `L2-007-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-007`](/artifact/l1/L1-007)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.45 · **Delta tier:** 5
> **⛓ On-chain block:** 41554157
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 64 – 1024 |
| W | px | 64 – 1024 |
| N t | — | 64 – 1024 |
| N tau | — | 1 – 3 |
| Photon count | — | 20 – 10000 |
| Irf shape drift | — | 0.0 – 0.2 |
| Afterpulsing rate | — | 0.0 – 0.05 |
| Ambient fluorescence | — | 0.0 – 0.2 |
## 2. Tolerance (ε)
**Type:** `fn`
```
0.05 - 0.02 * log10(photon_count / 20) + 0.15 * IRF_shape_drift + 0.2 * ambient_fluorescence
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.45 |
| Delta tier | 5 |
## 4. Fingerprint
`6163e9e0b815554729feba3e61ae68c6b90360c433cc5ed57a5af76ad9a7fa96`
## 5. On-chain Registration
- **Chain hash:** `0xe966d9b1a091433e98649ade66caa6c147999a260d9b35ee002377433ef9df42`
- **Chain tx hash:** `0x9a6973e64777d0b90fed8348cfe560200bacdefdb82036087e36abffee65c1d7`
- **Chain block:** `41554157`
---
## File Mapping
This bundle consists of: `L2-007-001.md`, `L2-007-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-007-001.md` | Source of truth — edit this | Human or LLM |
| `L2-007-001.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 `L2-007-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._