... choose E27/B22/E26 lamp holder.2. When unit is installed and using in the lampholders , the red LED indicator will be on ... is charging when power connected, charger can stores the energy in battery, the little led will keeping red when baterry full. Economical and ... switch on when power goes off)Applications:This Lamp is widely used in Super Market, Hotel,Tavern, Night Club,Disco Hall, Karaoke ...