𝐏𝐎𝐒𝐓 𝐒𝐄𝐕𝐄𝐍; 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 𝐟𝐨𝐫 𝐂𝐨𝐧𝐝𝐮𝐜𝐭𝐨𝐫 𝐚𝐧𝐝 𝐈𝐧𝐬𝐮𝐥𝐚𝐭𝐨𝐫. 𝐑𝐞𝐩𝐥𝐚𝐜𝐢𝐧𝐠 𝐭𝐡𝐞 𝐒𝐰𝐢𝐭𝐜𝐡 𝐰𝐢𝐭𝐡 𝐚 𝐩𝐚𝐢𝐫 𝐨𝐟 𝐂𝐫𝐨𝐜𝐨𝐝𝐢𝐥𝐞 𝐜𝐥𝐢𝐩

Clips apart: NO LIGHT
Clips Together : LIGHT

A plastic insulator inbetween the Clips : NO LIGHT
A Metal Coin conductor inbetween the Clips : LIGHT