FIVE (5) BRAND NEW NEVER USED CDS CADMIUM SULFIDE PHOTOCELL LIGHT SENSOR PHOTO CELL LDR RESISTORS 10MEG DARK SHIPS FROM N.Y. USA TOMORROW #5549 150V MAX 90MW MAX RISE TIME 20MS FALL TIME 30MS A cadmium-sulfide (CdS) photo resistor (or photo cell) is a device that changes resistance depending on light intensity. It is sensitive, fast, and has been around for decades. It's often used in street lights and as an "electric eye." Note the resistance decreases from millions of ohms in darkness to as little as thousands of ohms in bright light depending on the CDS cell you choose. FREE SHIPPING! FREE SHIPPING! THE ONLY WAY I CAN SAVE US BOTH $$ IS TO MAIL OUT IN A REGULAR STAMPED ENVELOPE WITHOUT TRACKING SEE MY OTHER OHM VALUES PHOTOCELLS: Click Here FOR MORE INFORMATION BEFORE BIDDING! I SHIP NOW! I SHIP NOW! FIXED SHIPPINGNO RETURNS AUCTION SO PLEASE BE SURE OF WHAT YOU ARE BUYINGREAD EVERYTHING TWICE AND SEE ALL THE PICTURES. I TRY MY BEST AT AN HONEST DESCRIPTION, PLEASE ASK ANY QUESTIONS BEFORE BIDDING OR BUYING! EXPERT PACKING AND NEXT POSTAL MORNING SHIPPING! NO FINE PRINT, YOU ARE SAFE HERE! FIXED HONEST SHIPPING COST, NO GOUGING LIKE THOSE OTHER AUCTIONS! YOU WILL RECEIVE A SHIPPING NOTIFICATION EXPERT PACKING AND NEXT POSTAL MORNING SHIPPING! I SHIP OUT FAST! THANKS FOR LOOKING!*****