Seabed Ceiling Lamp

Taken all the way down to base materials, one Seabed Ceiling Lamp is 4 crafting steps deep and needs 6 intermediates — Pewter Ingot ×4, Bluespirit Tile ×3, Wall Planter ×1 and 3 others — which resolve to 9 distinct raw materials totalling 59 units, plus 82 crystals.

That bill outweighs 13,079 of the 13,602 recipes tracked here and 2,117 of the 2,216 Goldsmith ones, and 1 recipe nests deeper.

Only 16 of those crystals go into the final step; the other 66 are burned by the intermediates, so the real crystal cost is 40 Wind Crystal, 29 Fire Crystal, 4 Fire Shard and 3 other kinds.

The chain crosses four disciplines — Goldsmith to Lv 90, Blacksmith to Lv 74, Alchemist to Lv 27 and Carpenter to Lv 25 — so no single class can finish it unaided.

All 9 raw materials are gathered, and one of them is time-gated: Prismstone (4:00, 16:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Of the intermediates, Walnut Lumber has the widest use: 128 recipes call for it, spanning eight of the eight crafting classes.