You can put some G.E. clear silicone caulking over the stickers. However, be aware that the tails may also leak around the outside edge. You can test it by duct taping over all but one bulb opening, slather some dish-soap in water with a paint brush around the outer edge seam and then blow into the un-taped opening...watch for a bubble. You can use the clear silicone on the edge too...dab a little on your finger and force feed it into the separation.
2001 F-150 SuperCrew, Lariat, 2WD, 3.55 LS, Black/gray leather, 5.4L Engine, Tow pack (1.02" radiator).
Mods: Gibson SideSwept Exhaust, Flowmaster Y, WMS Intake, Dual 16" E-fans, Gaylord lid, Duraliner, Bed Extender, Ventvisors, Colgan bra, Black Stull Billet Grille, Lightning Head/Corner/Tails, Hellwig SportTech front/rear swaybars, Rancho 9000 shocks, Denso Iridium IT16 plugs.