Can you put a higher wattage bulb in this lamp?
Yes, You can easily use a 25 watt bulb with a E12 Candelabra base. The lamp comes with a 15 watt bulb.
The light looks quite dim? Would like entire lamp to be lit?
The caviar grey salt lamp is intended to be used as a night light. The 25 watt bulb we use is able to penetrate the rock for a diffuse lighting experience that makes it perfect for dim night time lighting. The lamp in the photo is not at full brightness. The lamp comes with an adjustable dimmer as well.
Hope that is helpful!