ConstantON® Incandescent Replacement Bulbs - 5mm - Official Holiday Lighting Replacement Part Store
Prestige Glass Art 20 Cool White M5 Icicle LED Replacement Bulbs - Green Base - (Check and Make Sure What Type/Size/Shape Base You Need for Your String!!) - Amazon.com
Prestige Glass Art 20 Warm White M5 Icicle LED Replacement Bulbs - White Base - (Check and Make Sure What Type/Size/Shape Base You Need for Your String!!) - Amazon.com