Headlight Relay Kits

I ordered a kit from my local dealership a month ago and it finally came in this past friday.
Upon opening the box there was a Dear Customer letter inside. It seems they substituted a Halogen Semi Sealed beam headlamp unit in place of a Sealed Beam headlight unit [Halogen?].
It also indicated in the instructions that the Halogen lamp will be very hot when turned on or just been turned off.

Should I be concerned on the headlight being switched from sealed to Halogen semi sealed? [heat generated]
No mention if the original sealed beam was Halogen.

Also, would there be an issue with the heat when installed in a 1970 Dart Swinger with the plastic headlight grille surround?

Thanks
It looks like a decent kit for the price. [$30.00]