Here is what if found The original owner of the shadow will be forced to remain in darkness, as they will vaporize if hit by sunlight without their shadow.
[18] Being unable to exist in light, the original owner is also unable to cast any sort of reflection and is also unable to be photographed.
[19] It is worth noting that while being exposed to daylight after having one's shadows extracted usually means instant death, victims who had their shadows extracted for some time can actually last a little more under the sun than those who have had their shadows taken very recently; during the final battle against Moria, the shadowless Straw Hat members instantly had their upper bodies disintegrated while the
Rolling Pirates actually lasted a little longer.
Turns out the whole EE thing is just vaporization.