Value: Bronze Age
Confidence: Canon
Metalworking, writing, first cities.
Value: 0.36
Min: 0.3
Max: 0.4
Confidence: CalculatedGuess
Life a bit easier, less calories.
Pottery, no energy consuming industry.
But some ovens and plow pulling farm animals.
Still 200 W.
Value: 20e6
Min: 10e6
Max: 40e6
Confidence: Canon
References:
Quick Wikipedia research. Error bars guestimated.
Value: 3
Confidence: Canon
TL 3 Metal. Bronze smelting, writing, sailing, cities. Hardest tech: smelting copper and tin alloys at ~1100 C.
Value: 3
Confidence: Canon
Metalworking, writing, sailing, cities. Class 3 Bronze/Iron.
Still hunter gatherers and small commnities, but there have been cities for thousands of years.