Lamp bead model: SMD2835Power: 10WVoltage: DC30-32VCurrent: 250mA±5%Serial and parallel circuit: 11 sequence and 5 parallelSize: Φ93mm(3*inch)Crystal size: 15*30milNumber of crystals: 55pcsCrystal name: Epistar chipLumens: 1000LMAluminum substrate thickness: 0 (0)Thermal conductivity of aluminum substrate: 2/(m·K)Application place: Panel lightConditions of use: need a warmth sink, desire LED fixed current driveChip temperature does not exceed 65℃ Lamp bead model: SMD2835Power: 15WVoltage: DC48-51VCurrent: 250mA±5%Serial and parallel circuit: 18 sequence and five parallelSize: Φ115mm(4)Crystal size: 15*30milNumber of crystals: 90pcsCrystal name: Epistar chipLumens: 1500LMAluminum substrate thickness: zero (0)Thermal conductivity of aluminum substrate: 2/(m·K)Application place: Panel lightConditions of use: need a heat sink, desire LED constant recent driveChip temperature does not exceed 65℃ Lamp bead model: SMD2835Power: 22WVoltage: DC72-76VCurrent: 250mA±5%Serial and parallel circuit: 24 series and 6 parallelSize: Φ163mm(6)Crystal size: 15*30milNumber of crystals: 144pcsCrystal name: Epistar chipLumens: 2200LMAluminum substrate thickness: zero (0)Thermal conductivity of aluminum substrate: 2/(m·K)Application place: Panel lightConditions of use: need a warmth sink, want LED constant recent driveChip temperature would not exceed 65℃ Power: 36WVoltage: DC108-115VCurrent: 250mA±5%Serial and parallel circuit: 36 sequence and 7 parallelSize: Φ215mm (8)Crystal size: 15*30milNumber of crystals: 252pcsCrystal name: Epistar chipLumens: 3200LMAluminum substrate thickness: 0 (0)Thermal conductivity of aluminum substrate: 2/(m·K)Application place: Panel lightConditions of use: desire a heat sink, choose LED fixed current driveChip temperature would not exceed 65℃