Unless otherwise specified, foods give colonists energy according to the following table. Colonists can hold up to a maximum of 180 energy when fully fed.
Wuv is generated at 2/30 Wuv Per Energy or 2 Wuv per 30 Energy. This value is derived by dividing the time colonist stay fed on each foods tier with the rate of Wuv generated (see Wuv Table).
Each food tier also provide different Energy consumption rate. The value is derived from dividing The Energy value with consumption time for each tier (See Table Below).
The Energy consumption rate is determined by the colonist's current tier and if the food fed is of lower tier, the highest tier food fed to colonist. Thus, it is consider wasteful to fed higher tier food to lower tier colonist since the Wuv value generated is lower with an even more expensive food cost.
However, if a Tier 5 colonist is fed Tier 5 food, and were then continuously fed Tier 1 food, it will produce Tier 5 Wuv (x10000) for as long as the food bar stay above 0. This strategy/mechanic were rebalance by not being able to teach bots to fed an already fed colonist until the food bar reach 0.
The Amount of Time a Colonist stays fed in seconds can be described with the mathematical formula: 20 * tier2 + 10 * tier − 10 seconds