These figures belong to the named source and method. Historical costs are not current quotations. A value without its stage, material basis or measurement location is not a farm instruction.
| What is measured | Value and basis | Source and limitation |
|---|---|---|
| Oyster light for pinheads | 200 lux, 8-12 hours per day | ICAR-DMR manual, 2011. The folder gives 6-8 hours; below 100 lux caps turn pale. |
| Bacterial blotch ceiling | 20 degrees C and 85 % RH | NHB DPR model, 2018. Avoid both together; never leave a water film on caps. |

