After the LED bulb lamp is glued, it undergoes an aging test and water vapor appears

Cause

① During the glue application process, the ambient humidity is high, and the air moisture in the lamp shade is high. Part of it is used for curing and absorption of the sealant, while the other part is vaporized at high temperature during testing, resulting in water vapor when cold.

② The sealant is not fully cured, and after aging testing, the temperature increases, resulting in low glue content