30 seconds, then the details.
Pick the ESP8266 if you're doing relay-based on/off control of 12V lights — 4 to 8 zones, reliability-first, lowest cost per build. Pick the ESP32 if you're running addressable effects (WLED), want more than ~500 LEDs, or plan to grow the build with sensors and extra zones. The ESP8266 wins on price and simplicity; the ESP32 wins on headroom.
The rest of this page is the "why" behind that rule — the numbers, the tradeoffs, and what I've learned running both on real event builds.
ESP8266 vs ESP32, spec by spec.
| ESP8266 (NodeMCU / D1 mini) | ESP32 (DevKit / D1 mini32) | |
|---|---|---|
| Price | ~$4–6 | ~$6–10 |
| RAM | 80 KB usable (160 KB total) | 520 KB SRAM |
| Flash | 4 MB | 4–16 MB |
| GPIO count | ~11 usable | ~25+ usable |
| CPU | 1× 80 MHz | 2× 240 MHz |
| WiFi | 2.4 GHz, fine for lighting | 2.4 GHz + Bluetooth, more stable under load |
| LED ecosystem | Excellent — FastLED, WLED, endless tutorials | Excellent — same libraries, more headroom |
| WLED effects | OK — keep under ~500 LEDs | Great — smooth at scale, sound-reactive included |
| Relay / on-off control | Perfect — 4–8 zones with zero extra cost | Overkill — works, but you pay more for nothing |
Price & availability
The ESP8266 is about half the price and both are available everywhere. For a 4-zone relay controller, the ESP8266 build costs roughly $4–6 for the brain; the ESP32 build costs $6–10 for the same job. The difference is a coffee — but if you're building multiple controllers for an event, it adds up.
GPIO count and RAM
The ESP32 has more than twice the usable GPIOs and roughly six times the RAM. RAM is the one that actually bites in lighting: addressable LED effects and sound-reactive processing eat memory fast. The ESP8266 has ~80 KB of usable heap; a WLED install with heavy effects can run out on a big strip. The ESP32 doesn't break a sweat.
WiFi and the LED ecosystem
Both boards run the same core libraries — FastLED, WLED, ArduinoOTA — and both handle web control, MQTT, and AP mode fine. The ESP32's WiFi is a bit more stable under sustained load and it adds Bluetooth. For a lighting controller serving a handful of web clients, you won't notice the difference; the ecosystem is identical because the code is nearly identical.
The ESP8266 path: zones, not effects.
For the most common event-lighting job — switching 12V LED strips on and off in a few zones — the ESP8266 is the right tool. The ESP32's extra power buys literally nothing on this workload, and the ESP8266 is cheaper and simpler to wire.
4–8 zones of on/off control
Relay module + ESP8266 + 12V strips = the whole controller. Four zones need four GPIOs (D1, D2, D5, D6), and the ESP8266 has them all clean and boot-safe.
- Cost: lowest per build
- Complexity: minimal — no level shifters, no power injection
- Reliability: a relay either clicks or it doesn't — nothing to tune
Lowest cost per build
If you're building several controllers (one per marquee, one per room), the $2–4 per-board saving multiplies. The ESP8266 also draws less power, which matters on battery or small USB supplies.
- Multiple units: same firmware, same wiring
- AP mode: each controller makes its own network — venue WiFi not needed
The Event Lighting Control pack is built for the ESP8266 path — four zones, three control modes, and firmware that's field-tested on real gigs.
👉 See the ESP8266 Event Lighting Pack ($19)The ESP32 path: effects and headroom.
Once the project is about addressable effects — WLED rainbow washes, sound-reactive beats, big matrix panels — the ESP32's RAM and GPIO count stop being nice-to-haves and start being requirements.
WLED effects at scale
WLED runs on the ESP8266, but the ESP32 handles more LEDs, smoother effects, and the sound-reactive builds without stuttering. Rule of thumb: over ~500 LEDs, or any serious sound reactivity, go ESP32.
- Effects: smooth at 1000+ LEDs
- Sound-reactive: stable audio processing
- Firmware: WLED and most effect frameworks run better
More zones, more sensors, more headroom
If you're adding buttons, PIR sensors, temperature probes, or planning to grow the build later, the ESP32's extra GPIOs and dual cores give you room to expand without re-buying hardware.
- GPIOs: ~25+ usable vs ~11
- Bluetooth: phone apps can talk to it directly
- Headroom: more RAM for future firmware features
Both boards on real event builds.
I've run both on actual jobs — weddings, parties, exhibitions — and the honest pattern is this: the events that need to just work use the ESP8266 with relays. Four zones, 12V strips, AP-mode web control, and it's been dependable for years. The events that need a show use WLED on an ESP32 — dance-floor effects, music-synced washes — where the extra RAM is the difference between smooth and stuttering.
The mistake I see most is buying the ESP32 "just in case" for a simple relay job. It works, but you're paying for headroom you never use, and the ESP8266's simpler boot behavior means one less thing to go wrong at 4pm the day of the event.
Put it on the fridge
≤ 8 zones, on/off only, reliability-first └─► ESP8266 (cheaper, simpler, proven) Effects, WLED at scale, >500 LEDs, sensors └─► ESP32 (RAM, GPIOs, Bluetooth) Not sure? Build the first version on an ESP8266. The wiring is nearly identical, and you can move to ESP32 later without redoing much.
In my experience, most hobbyists overestimate what they'll build and underestimate how much "just make it reliable" matters. Start simple; upgrade when a specific feature forces you to.
Quick answers before you order.
Is the ESP32 harder to use than the ESP8266?
Not meaningfully. Both use the same Arduino IDE workflow, the same wiring, and the same libraries for most LED projects. The ESP32 has a few extra concepts (dual cores, more peripherals), but for simple relay or WLED builds the code looks nearly identical.
Can I run WLED on an ESP8266?
Yes. WLED runs fine on an ESP8266 for moderate LED counts — keep it under roughly 500 LEDs for smooth effects. Above that, or with heavy sound-reactive processing, the ESP32 is the better choice because it has more RAM.
Does the ESP32 have better WiFi than the ESP8266?
Yes, a bit. The ESP32 supports 2.4GHz WiFi with better throughput and more stable simultaneous connections, and it adds Bluetooth. For lighting control (web pages, MQTT, AP mode) both are more than adequate — the difference rarely matters at the scale of a room or venue.
Which board should a complete beginner buy for their first lighting project?
If the project is simple on/off zone control of 12V strips, start with the ESP8266 — it's cheaper, simpler, and the tutorial ecosystem is huge. If you know you want WLED effects at scale or plan to grow the build later, the ESP32 is the safer long-term buy.