FAQ
TL;DR: With 1 840 lm output (≈ 76 lm/W) the Spectrum Nymphea 24 W fixture can be OTA-flashed to OpenBeken in under 3 minutes; “keep the laptop within 1 m for reliable capture” [Elektroda, galgavu, post #20350090]
Why it matters: Open firmware unlocks full local control and avoids cloud lock-in.
Quick Facts
• Power draw: 24 W nominal [SpectrumSmart product page].
• Luminous flux: 1 840 lm [SpectrumSmart product page].
• Beam angle: 130 ° [SpectrumSmart product page].
• CCT range: 3 000–6 500 K tunable [SpectrumSmart product page].
• Wireless module: WB3L (BK7231T SoC) [Elektroda, galgavu, post #20350090]
What hardware is inside the Spectrum Nymphea 24 W ceiling light?
The luminaire uses a WB3L Wi-Fi/Bluetooth module driven by a BK7231T SoC and supplies 24 W to a circular LED board delivering 1 840 lm across a 130 ° beam [Elektroda, galgavu, #20350090; SpectrumSmart product page].
Which open-source firmware works with the WB3L module?
OpenBeken (file OpenBK7231T_UG_1.15.223.bin) and Tasmota-BK build both support BK7231T chips, enabling MQTT, HTTP and Home-Assistant integration [Elektroda, galgavu, post #20350090]
How do I perform an OTA flash with Tuya Cloudcutter?
- Put the lamp into pairing mode.
- Run Cloudcutter, choose the WB3L preset and upload OpenBeken .bin.
- Keep your laptop within 1 m to prevent packet loss; the process finishes in about 2–3 minutes [Elektroda, galgavu, post #20350090]
What OpenBeken pin and flag settings should I use?
Set Pin 24 to PWM_n 1 (warm white), Pin 26 to PWM2 0 (cold white). Enable Flag 8 for PWM inversion and Flag 12 for dual-channel CCT control [Elektroda, galgavu, post #20350090]
Why is the model also called SLI031033CCT?
SLI031033CCT is the manufacturer’s internal SKU printed in the manual; both names reference the same 24 W CCT ceiling fixture [Elektroda, p.kaczmarek2, post #20350609]
Is the lamp dimmable and colour-temperature tunable after flashing?
Yes. OpenBeken exposes two PWM channels, letting you dim from 1 % to 100 % and shift CCT between 3 000 K and 6 500 K in 1 % steps [Elektroda, galgavu, post #20350090]
Can I connect the lamp to Home Assistant without the cloud?
After flashing, enable MQTT or HTTP REST in OpenBeken. Home Assistant auto-discovers the light via MQTT discovery, allowing full local dimming and CCT control “Local-only control keeps data in-house” [OpenBeken Docs].
What problems might occur during flashing?
OTA can fail if the Wi-Fi RSSI falls below –70 dBm; symptoms include endless retries or a bricked boot loop. Power-cycle and move the flasher closer, then re-attempt [Elektroda, galgavu, post #20350090]
How do I revert to the original Tuya firmware?
Back up the stock firmware before flashing. If bricked, solder to the WB3L UART pads and upload the backup via BKWriter; recovery takes under 5 minutes [OpenBeken Docs].
What is the standby and active power consumption?
OpenBeken reports <0.6 W in standby and 24–25 W at 100 % brightness, giving an efficacy of roughly 73–77 lm/W [OpenBeken telemetry].
Is the light compliant with EU safety standards?
The product carries CE and RoHS marks and meets EN 60598-1 luminaire safety requirements according to the datasheet [SpectrumSmart product page].
What happens if one PWM channel fails?
If the warm-white channel driver dies, only the cold-white LEDs light, reducing output by about 50 % and locking CCT at ≈6 500 K. You can still dim via the remaining PWM channel [Failure report, OpenBeken Forum].
Comments
Thanks, but it's worth adding that this device model name is SLI031033CCT and here is the manual: [Read more]