When I am stringing these together with an external 5v power supply do I also need to connect (string) the power wires down the line?

If you're asking if these can be daisy-chained, the answer is yes, but only to a point. 3 strings (150 lights) can easily be connected together and powered by a single 5v power supply at one end. If you want more than that, you might need to wire in additional power lines to compensate for voltage drop (look up power injection, there is a lot of information available online).

Are there IP68 waterproof connectors available to keep waterproofing longer than one string?

No. The connectors are non-waterproof. You can choose the 12V version. They come with the waterproof connectors. ASIN: B077X33FWG

Understand that I only have to apply power ever 3 strings or so, but when stringing them together do I need to connect the power between strings?

For 5V strings if you want good full-power whites you really need to inject power every two strings (100 lights) . Even when doing that the last few lights of each group of 100 will be a little off in color unless you tie power between strings. I use wall transformer switching supplies and they don't seem to mind being tied together. I think the wire resistance is enough to keep them from fighting each other (oscillating). With 12V strings you can have more lights between injection points (maybe 150) but they use about twice the power. I measured 31 watts for 100 12V pixels and 17.5 watts for 5V pixels. Both 100% white with similar brightness.

What gauge wire is used?

It is thin, maybe 18ga? But it does have power injection leads on each end, so I just piped in 5v between each strand with some 14ga spkr wire and 10 strands work great on my tree. Beware, they smell awful, it's been 45 days and I can still smell the epoxy.

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WS2811 Diffused Digital RGB LED Pixel Lights Green Wire Individually Addressable Round DIY LED Pixels Module IP68 Waterproof DC5V 50pcs/Set

WS2811 Diffused Digital RGB LED Pixel Lights Green Wire Individually Addressable Round DIY LED Pixels Module IP68 Waterproof DC5V 50pcs/Set

Product ID: 52420485

Details

Brand
WESIRI
Color
Multiple
Indoor/Outdoor Usage
Outdoor
Light Color
RGB
Light Source Type
LED
Material
Silicone

⚡5V low voltage power

🎨24-bit full color control

💧IP68 waterproof rating

E£ 2915

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Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌈 Light up your world with precision and waterproof brilliance!

VERSATILE APPLICATION - Perfect for logos, signage, ambient lighting & creative DIY projects
WEATHERPROOF DURABILITY - Silicone coating ensures reliable outdoor & underwater use
CUTTABLE FLEXIBLE DESIGN - Easily trim or extend without damaging the rest of the string
INDIVIDUALLY ADDRESSABLE LE DS - Control each pixel’s color & brightness for custom animations
VIBRANT 256 BRIGHTNESS LEVELS - Smooth, vivid lighting with 16 million color possibilities

The WS2811 Diffused Digital RGB LED Pixel Lights set includes 50 individually addressable round LEDs with full 24-bit color and 256 brightness levels. Powered by a 5V DC supply and protected by IP68 waterproof silicone, these lights are perfect for customizable, durable outdoor and indoor lighting projects. Each pixel can be programmed independently and cut to size, making them ideal for dynamic signage, artistic displays, and immersive environments.

Specifications

ASIN	B075T84ZR3
Additional Features	Waterproof
Best Sellers Rank	#109,998 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #749 in LED Strip Lights
Brand	WESIRI
Brand Name	WESIRI
Color	Multiple Colors
Control Method	Remote
Controller Type	Button Control
Customer Reviews	4.5 out of 5 stars 79 Reviews
Form Factor	String
Included Components	LED Lights
Indoor Outdoor Usage	Outdoor
Indoor/Outdoor Usage	Outdoor
Ingress Protection Code Rating	IP68
Item Length	3.5 meters
Item Weight	10.56 ounces
Light Color	RGB
Light Source Type	LED
Manufacturer Part Number	43220-4403
Material Type	Silicone
Model Number	43220-4403
Number of Items	50
Number of Light Sources	50
Power Source	Corded Electric
Product Style	Traditional
Special Feature	Waterproof
Theme	Indoor
UPC	603335042815
Unit Count	50 Count
Water Resistance Level	Waterproof
Wattage	15 watts
hanging_pattern_layout	Linear

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E£ 2915

Duties & taxes included

In stock

Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to EGYPT.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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