SRD series| Direct Ring LED, High intensity LED can illadiate a object with specific Working distance. Available colors are Red, White, Blue, Green.| SRD-38-15RH / SRD-38-15W / SRD-40-25RH / SRD-40-25W / SRD-50-28RH / SRD-50-28W / SRD-66-36RH / SRD-66-36W / SRD-70-39RH / SRD-70-39W / SRD-90-50RH / SRD-90-50W / SRD-110-60RH / SRD-110-60W / SRD-140-95RH / SRD-140-95W