LED Strip Lights Complete Guide: Installation, Power Supply, and Best Brands

I've installed LED strip lights in six rooms of my house — under kitchen cabinets, behind the TV, along the stair railing, and in my workshop. My first attempt ended with a flickering mess because I bought a 12V strip with an undersized power supply. After burning through $60 in bad parts, here's everything I learned about getting LED strips right the first time.

What Are LED Strip Lights and How Do They Work?

LED strip lights (also called tape lights or ribbon lights) are flexible circuit boards with surface-mounted LEDs. They run on low-voltage DC power — typically 12V or 24V — and come in 5-meter reels. The strip has adhesive backing and can be cut every 3 LEDs (about 5cm) along marked cut lines. I use 24V strips for long runs (over 5 meters) and 12V for short cabinet lighting — less voltage drop on 24V.

12V vs 24V LED Strips: Which Should You Choose?

After running both types in parallel, here's what I found:

• 12V strips: Cheaper, widely available, good for runs under 5 meters. I pay about $12 for a 5-meter roll on Amazon. Downside: noticeable voltage drop after 5m — the tail end is dimmer.
• 24V strips: Better for longer runs (up to 10 meters without visible drop). I used 24V for my 7-meter kitchen run and the brightness is uniform. Costs about $18 per 5m roll.

My recommendation: use 24V for any permanent installation over 3 meters. The extra $6 is worth not having a dim tail.

How to Choose the Right Power Supply for LED Strip Lights

This is where I made my first mistake. I used a 2A power supply for a 5-meter strip that needed 3.5A. The strip flickered, the supply overheated, and it died in three weeks.

Here's the formula I now use for every install:

1. Find the wattage per meter on the strip spec (usually 14.4W/m for 60 LEDs/m)
2. Multiply by strip length: 5m × 14.4W = 72W
3. Add 20% headroom: 72W × 1.2 = 86.4W
4. Divide by voltage: 86.4W ÷ 24V = 3.6A minimum

I installed a 100W 24V power supply (about $22 on Amazon) for my 5-meter 24V kitchen strip. It's been running 6 hours daily for 18 months without issues.

RGB vs RGBW vs Addressable LED Strips: What's the Difference?

I bought all three types for different rooms. Here's the breakdown:

• RGB (3-in-1): Red + Green + Blue LEDs. Can make 16 million colors but white is a poor blueish mix. I use this for my gaming room bias lighting — $18 for 5m.
• RGBW (4-in-1): RGB + dedicated white LED. Better white (2700K-6500K tunable). I installed this in my living room — $32 for 5m. Worth the extra $14 for a proper warm white.
• Addressable (WS2812B/SK6812): Each LED can be controlled individually. I used these for my stair railing — chasing effects, color fades, etc. Runs on 5V (not 12/24V) which means thicker wires. $25 for 5m.

For most home use, RGBW is the sweet spot. The dedicated white LED makes it usable as actual lighting, not just decoration.

How to Install LED Strip Lights Under Kitchen Cabinets

I documented my kitchen install step by step:

1. Measure twice: My kitchen has 3 cabinet sections — 1.2m + 2.1m + 0.9m = 4.2m total. I bought a 5m strip and cut it into three pieces.
2. Clean the surface: Used isopropyl alcohol on the cabinet underside. The adhesive stuck immediately and hasn't failed in 18 months.
3. Solder connections: I soldered 4-pin JST connectors between the three sections. Pre-made connectors ($6 for a 10-pack) work but I had one fail — soldering is more reliable.
4. Mount power supply: Placed the 100W supply inside a cabinet with a vent. Drilled a 12mm hole for the wire — covers available for $3.
5. Connect to switch: I wired a smart plug so the strips turn on with “Alexa, kitchen lights on.” Cost: $15 for the smart plug.

Total cost: ~$55 for a professional-looking under-cabinet lighting system. A contractor quoted me $350.

Best LED Strip Light Brands for 2026

I've tested eight brands over the past two years. Here's my ranking:

1. Govee: Best overall. Their RGBIC strips ($35 for 5m) have great color accuracy and the app is actually usable. My top recommendation.
2. Philips Hue: Best ecosystem. Gradient strips ($90 for 2m) sync with Hue bulbs. Expensive but flawless integration.
3. Lepro: Best budget. AIO RGB+W strips ($19 for 5m) with remote. Not as bright as Govee but 70% cheaper.
4. BTF Lighting: Best for DIY. WS2812B addressable strips ($22 for 5m). No app, just raw LEDs for WLED projects.
5. DAYBETTER: Decent cheap option ($14 for 5m). I use these for temporary holiday lighting.

I have Govee RGBIC in my living room and Lepro in my workshop. Both have been running daily for over a year.

Common LED Strip Problems and Fixes

• Flickering: Usually undersized power supply. I replaced my 2A with a 5A and the flicker vanished instantly.
• One section dimmer: Voltage drop. Solution: inject power at both ends (I run a parallel 18AWG wire).
• Adhesive failing: The 3M tape on cheap strips fails in heat. I use mounting clips ($4 for 20-pack) on every strip.
• Color mismatch: RGB and RGBW strips have different whites. Never mix types in the same room.
• WiFi disconnect: Smart strips lose WiFi after power outage. I put all mine on a schedule via the app, not cloud-dependent.

Can You Cut LED Strip Lights?

Yes — every strip has marked cut lines every 3-6 LEDs. I've cut dozens of strips with regular scissors. The key: cut exactly on the copper pad line, not between LEDs. If you cut in the wrong spot, those LEDs won't light. I did this once and had to throw away a 30cm section.

How to Connect Multiple LED Strip Sections

For my kitchen, I connected three sections. Two methods work:

• Soldering (recommended): Solder 4 wires between sections. Heat shrink each connection. Takes 15 minutes, lasts forever. I use a TS100 iron at 350°C with lead-free solder.
• Connectors: Clip-on LED strip connectors ($6/10-pack). Faster but less reliable — one of mine corroded after 6 months in a humid kitchen.

I solder all permanent installations and use connectors only for temporary setups.

LED Strip Lights Power Consumption

I measured my 5-meter RGBW strip with a Kill-A-Watt meter:

• White at full brightness: 72W (similar to one old incandescent bulb)
• RGB colors: 45-60W depending on color
• Standby: 0.5W (controller and WiFi)
• Daily cost (6 hours): $0.05 at $0.12/kWh
• Yearly cost: $18.25

Running my kitchen strips 6 hours daily costs less than one Starbucks drink per month.

LED Strip Lights Buying Checklist

1. Choose voltage: 12V (short runs) or 24V (long runs)
2. Choose type: RGB (decoration), RGBW (functional lighting), Addressable (effects)
3. Calculate power: watts = W/m × length, add 20% headroom
4. Buy brand: Govee (best), Lepro (budget), BTF (DIY)
5. Get accessories: mounting clips, JST connectors, 18AWG wire

Also read: LED Lights Complete Guide · Smart Lighting Guide · RGB vs Addressable Guide