Brand: Bondic. MPN: 4XKJ8672PY5MUMP5. .Bondic Replacement LED Light.Adhesion Strength: Medium Strength.Product Type: LED Replacement Adhesive Curing Light.Recommended Surface: Most Surfaces.Number in Package: 1 pk.Packaging Type: Blister Card.Indoor or Outdoor: Indoor and Outdoor.Replacement LED can last up to 5 continuous hours when new. If you use it for 3-6 second periods it can last ages, more than a year. Fits ACE Item # 1646041.