These ion tails can be quite large, and some have been observed to be nearly 4 times the distance of the Earth from the Sun. And even though they fill a great volume, they are also pretty diffuse. If you condensed a comet’s tail down to the density of water, it wouldn’t even fill a swimming pool.
During the first few days of operation, it is normal to see some moisture appear in your Saturn Ion tail lens. This is due to the small amounts of moisture in the plastic and coating that are evaporated when the tail lens are first warmed up during use. This sort of moisture is normal and should disappear within a few days.
To be sure that no external moisture gets into the new Saturn Ion tail lens though, it is a prudent idea to silicone seal the edges. Clear silicone sealant can be found in any hardware store (and some auto part stores), and can be applied to the seam along the Ion taillights where the clear lens meets the rear housing. Also, even if a bulb has died, make sure to keep it installed in the Ion tail lamp until you replace it to prevent moisture from entering through the bulb hole.
While smoking your Saturn Ion taillights (tinting them) is certainly possible through the use of carefully applied spray tint (use light even coats), doing so may make them too dark to be legal. Please check your local laws as well as smoked Saturn Ion taillights of any darkness might be illegal in your area.