Why sealed beam? Old school is the answer!
It's a lamp with a really tight beam. Forms a clean spot that throws a super far distance, but doesn't draw a lot of power. With the 6V lantern battery, it would give 12+ hours of usable light. As a spotlight.
The US Navy likes that lamp. Look up Navy Battle Lantern!
Step 1: Things You Will Need
2. A PVC 4"x4" hub.
3. Sealed beam lamp #4546. Still made and sold online.
4. A 6V lantern battery. About $8.50 at Lowes. They have cheaper ones, but the Duracell is alkaline and is made in the USA!
5. A round piece of clear plastic, 4 1/2" in diameter. For the lens guard.
6. Silicone caulk.
7. A screen door handle with button.
8. A pushbutton switch.
9. Screws to hold on the screen door handle, and 2 1 1/2" long 1/4" sheet metal screws of lag screws. To hold the battery.
10. Wire - about 2 feet of #20 wire.
11. 2 feet of screen window spline.
12. A PVC 4" test cap. Forms the back of the flashlight.