3w LED PCB with 3 lights: 1. 2.7W aluminum base material 2. 3.0 watt leds 3.anti-yellow ... class LED lightening products. 3. Thermal Conductive ---material with above 2.0 (W/m·K), up to ... multi-layer board, high density board, including MLB with blind/buried via holesMain base material:FR-1, ... 4, CEM-1, CEM-3, High Frequency Laminate with various dielectric constant (imported or from local supplier), ...