No one lights a lamp and then covers it with a bowl or hides it under a bed. A lamp is placed on a stand, where its light can be seen by all who enter the house.
Are any of you sick? You should call for the elders of the church to come and pray over you, anointing you with oil in the name of the Lord. Such a prayer offered in faith will heal the sick, and the Lord will make you well. And if you have committed any sins, you will be forgiven.