I want to change my 921 style lights to LEDs. I bought these, which had mixed reports about brightness, but were cheap: https://www.amazon.com/gp/product/B07435MQ17/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1 But they don't work! I've flipped them around to account for polarity. A couple of them gave a dim flash when I popped them in at first, but they never fully lit. Can anyone either tell me what I'm doing wrong, or refer me to a good brand that will work? I need to replace 6 interior lights.