Will these operate at 4.5v without a resistor?

No and make sure your very gentle with them. I snapped the wire of two and could not repair.

can you run all 5 lights off a dc battery? if so, please provide a specific recommendation. thank=you

I did and haven’t had any problem.

How do you strip the wires? Are both wires insulated? Does it matter which is ground and which is positive? Thank you

The wires come stripped already, they are insulated, and the longer wire is positive (+). If by some chance you get the wires crossed, the light will not work because it's DC. The wire insulation is silicon (I think) and is not affected by heat from soldering. You can run the lights on 3 volt DC or solder the enclosed resistors on the positive wire and run on 12 volt or something in between. There are instructions included for using the lights on voltages above 3 V DC. I used silicon insulated wire # 28 and it worked great but I think the wires on the lights are #30 gauge. Very fine wire but tough. No problem wiring these lights. I ran three lights in series on one resistor coming off the transformer and they work good on 12V.

LYM20 5pcs Model Railway Train Lamp Post 1.5cm 0.59inch Flood Lights HO OO TT Scale LEDs New

Product ID: 68393126

Details

Color
Warm White
Brand
Evemodel
Theme
Railway
Recommended Uses For Product
Outdoor
Mounting Type
Tabletop

⚡3V power

💡5 LED lamps

📏1.5cm height

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Rp685231

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Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Color
Warm White
Brand
Evemodel
Theme
Railway

Description

💡 Light Up Your Imagination!

ENERGY EFFICIENT - Low operating current of just 20mA for sustainable modeling.
EASY INSTALLATION - Includes 5 lamps and resistors for hassle-free setup.
ILLUMINATE YOUR LAYOUT - Transform your model railway with realistic lighting.
VERSATILE COMPATIBILITY - Works seamlessly with HO, OO, and TT scales.
PERFECT FOR NIGHT SCENES - Create captivating night-time displays that wow your audience.

The LYM20 Model Railway Train Lamp Post set includes five 1.5cm LED flood lights designed for HO, OO, and TT scales. Operating at 3V with a low current of 20mA, these lamps come with resistors for easy installation, making them perfect for enhancing your model railway's nighttime aesthetics.

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