Satco's single watt bulb is a replacement bulb for S8020 string light. With an aluminum base, this clear bulb is rated for both indoor and outdoor use. Providing 15,000 hours of warm white light, this lamp comes in a four pack.|Satco's S8027 single watt bulb is a replacement bulb for S8020 string light. With an aluminum base, this clear bulb is rated for both indoor and outdoor use. Providing 15,000 hours of warm white light, this lamp comes in a four pack.