Rear Lamp Bulb Replacement with LED’s

[dbs600]

Had my rear lamp lenses smoked with tinted clear coat, but they didn’t come out dark enough.

 

Before I go darker, however, I’d like to up the brightness of the rear bulbs.

 

Picked up Sylvania 7443 ZEVO LED Bulbs: https://www.oreillyauto.com/detail/b/zevo-5029/accessories-16449/accessories---exterior-16767/exterior-lighting-16612/led-replacement-bulbs-20874/e6ac682cd82e/sylvania-7443-high-performance-white-zevo-led-mini-bulb-pack-of-2/7443ledbp2/4743393?pos=1

 

But when installed into the lamps, they weren’t any brighter than stock!?

 

Anyone have any suggestions on what bulbs I should use behind a tinted rear lamps?

 

Thank you.