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.
Step 2: Body of the Flashlight
Starting with a longer piece of pipe, cut 2 1/2" wide 'rings' from it. These will be used for the lens guard in step 7. Then cut off enough to make the flashlight body 9" long.
Next, drill holes in it to mount the screen door handle and the switch.
The 2 small holes are for the handle and the larger hole is for the pushbutton switch.
The button on the screen door handle will turn on the light!
Step 3: Make the Switch Waterproof.
When the switch is tightened down, the rubber will keep out water.
Step 4: Mount the Switch.
Step 5: Mount the Handle.
I put caulk around the holes before I put the handle in to keep things waterproof.
Here you can also see the yellow rubber glove end from the inside.
Step 6: Set Up the Shock Proofing for the Lamp.
Step 7: Make the Lens Guard.
I cut out the clear plastic with a jig saw.
These pieces get caulked around the edges and pushed into the hub as far as possible.
Step 8: Wire Up the Sealed Beam Lamp.
Step 9: Put the Business End Together.
Caulk it first. You could use solvent weld glue, but then it could never come apart, and the lamp couldn't be replaced.
Step 10: Make the Battery Holder.
Put 2 3/16" holes in the pipe, right where you want the battery (about 2 1/2" from the open end of the pipe). Put two 1 1/2" long quarter inch sheet metal screws into the holes. After the battery is in, tighten the screws down. They will push against the battery and hold it.
Step 11: Wire Up the Battery.
A screw terminal battery is better, but hard to find. You can use a spring terminal battery, but then you have to put screws and washers through the terminals. Heck, soldering might be easier!
Step 12: Finish 'er Up!
Put caulk around the open end of the pipe. Then push on the 4" test cap.
Step 13: The Final Product.
That 6V battery will store for a long time. I have an alkaline one that still works after being used occasionally for 10 years!
The sealed beam lamp uses little power, but has a great throw.
This thing would be great on a boat!