# Lab Lv. 4 research

> Lab Lv. 4: Required Materials. Timber, Iron Ore

Canonical: https://lostark.wiki/database/stronghold-research/lab-lv-4-102004?relation=research_materials

Add a sleeping room for the diligent researchers.  
They'll no longer want to go home.

## Facts

- **Category**: Building Upgrade
- **Research Effect**: Lab Building Upgrade
- **Time Taken**: 0d 20:00:00
- **Required Action Energy**: 5,760
- **Research Cost**: 62 Gold
- **Stronghold XP gained**: 11,520
- **Research Requirements**: Lab Lv. 3; Stronghold Lv. 25 or above

## Related

- [Required by research](https://lostark.wiki/database/stronghold-research/lab-lv-4-102004#relationships) (4)
- [Required Materials](https://lostark.wiki/database/stronghold-research/lab-lv-4-102004?relation=research_materials#relationships) (2)

### Required Materials

1–2 of 2

| Name | Quantity | Details |
| --- | --- | --- |
| [Timber](https://lostark.wiki/database/items/timber-6882301) | 50 | Quantity 50 |
| [Iron Ore](https://lostark.wiki/database/items/iron-ore-6882401) | 50 | Quantity 50 |

## Related

- [Home](https://lostark.wiki/)
- [Stronghold Research](https://lostark.wiki/database/stronghold-research)