light capricorn christmas light tester instructions replace car alternater cheap christmas paper plates watt light bulb. Capricorn electronics offers a broad range of electronic products including MICROMOTORS, Micropumps, Testers, RF devices, Oral care, Christmas and Halloween products. In the good old days, when your Christmas lights went dark, you had to test each bulb. Nowadays, Christmas light testers make the job much easier and faster. This Christmas Light Tester will allow you to easily find any burned out bulbs on your Indoor Christmas Light. Model SF102 Light Tester Instructions This Light Tester is designed to Then find and replace burnt out bulbs. b) A “buzz” is heard in light string. The old Google Groups will be going away soon, but your browser is incompatible with the new version. You can individually test miniature light bulbs. Working bulbs inserted into the tester will illuminate immediately, indicating they are functioning properly. The wattage would be identical but add the number of Lumens for each bulb to get the actual usable light output. How to Make a Mini Christmas Light Bulb Tester. Best Answer: Christmas Light Tester Item Number: TD24 28540 This Christmas Light Tester will allow you to easily find any burned out bulbs on your Christmas lights.