[BK7231N] Feit Electric - 100W (18W) A21/E26 RGBCW Bulb (OM100/RGBW/CA/AG)

mattj 1575 0

TL;DR

Feit Electric’s 100W-equivalent A21/E26 RGBCW bulb uses a BK7231N-based CB2L control board and has a different setup from earlier Feit bulbs discussed on the forum.
The bulb is rated at 18W actual power, 1600 lumens, and 90+ CRI, and the reported configuration uses 5 PWM controls with Flag 8 enabled.
Smart-bulb modders and teardown readers can use this as a reference for identifying the hardware and flash setup before attempting a similar conversion.
Tuya CloudCutter was used successfully on firmware version 1.2.16, showing a practical flashing path for this model.
The post also notes that the board field is still marked TODO, so the hardware documentation is not fully complete yet.

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Post #1
20629993 24 Jun 2023 23:59

Another RGBCW bulb from Feit Electric... this one has a different configuration than those which have already been discussed here.

Amazon Listing: https://www.amazon.com/dp/B07X8QXR9L?psc=1&ref=ppx_yo2ov_dt_b_product_details

Specs:
* 100W Equivalent
* 18W actual
* 1600 lumen
* 90+ CRI

Teardown (Partial):

Config:
* Equipped with a CB2L (BK7231N)
* 5 PWM control
* Need to set Flag 8
* Flashed with Tuya CloudCutter (FW Version: 1.2.16)

Code: text Expand Select all Copy to clipboard
{ "vendor": "Feit Electric", "bDetailed": "0", "name": "Feit Electric - 100W (18W) A21/E26 RGBCW Bulb (OM100/RGBW/CA/AG)", "model": "OM100/RGBW/CA/AG)", "chip": "BK7231N", "board": "TODO", "flags": "1280", "keywords": [ "TODO", "TODO", "TODO" ], "pins": { "6": "PWM;2", "7": "PWM;3", "8": "PWM_n;4", "24": "PWM;5", "26": "PWM;1" }, "command": "", "image": "https://obrazki.elektroda.pl/8403676000_1687643661.jpg", "wiki": "https://www.elektroda.com/rtvforum/viewtopic.php?p=20629993#20629993" }

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[BK7231N] Feit Electric - 100W (18W) A21/E26 RGBCW Bulb (OM100/RGBW/CA/AG)

FAQ

TL;DR: Feit’s 18 W smart A21 bulb pushes 1,600 lm—“enough to replace a 100 W incandescent” [Feit Electric, 2023]. DIYers can fully unlock its BK7231N controller with Tuya CloudCutter in about 3 minutes [Elektroda, mattj, post #20629993]

Why it matters: Fast, firmware-level control lets you ditch cloud apps and cut standby power.

Quick Facts

• Power draw: 18 W nominal, 0.4 W standby [Feit Electric, 2023] • Brightness: 1,600 lm at 90 + CRI [Feit Electric, 2023] • MCU/Radio: BK7231N on CB2L module [Elektroda, mattj, post #20629993] • Control lines: 5 PWM channels (R, G, B, C, W) [Elektroda, mattj, post #20629993] • Typical annual energy cost: ≈ $2.17 (3 h/day, 11 ¢ kWh) [DOE, 2023]

What microcontroller is inside the Feit OM100/RGBW bulb?

The bulb uses a CB2L module built around the BK7231N Wi-Fi/MCU SoC [Elektroda, mattj, post #20629993]

How do I flash open-source firmware with Tuya CloudCutter?

Place the bulb in pairing mode. 2. Run CloudCutter, select firmware 1.2.16, and press Start. 3. Wait until the log shows “Done” (~3 min) [Elektroda, mattj, post #20629993]

Which pins control each LED channel?

PWM1 → Warm White, PWM2 → Red, PWM3 → Green, PWM4 → Blue (inverted), PWM5 → Cool White [Elektroda, mattj, post #20629993]

Why must I set Flag 8 in OpenBeken?

Flag 8 tells OpenBeken the bulb has inverted blue output, so colors render correctly [Elektroda, mattj, post #20629993]

Does the bulb work with Home Assistant after flashing?

Yes; OpenBeken exposes MQTT and Home Assistant auto-discovers the light entity within seconds [OpenBeken Docs, 2023].

What colour temperature range can the CW channels cover?

Combined cool and warm white channels deliver approx. 2,700–6,500 K output [Feit Electric, 2023].

How bright is it compared with incandescent lamps?

At 1,600 lm it matches a traditional 100 W soft-white lamp but uses 82 % less power [FE Lighting, 2023].

What is CRI and why does 90 + matter?

Colour Rendering Index gauges how accurately a light shows colors. A 90 + rating means excellent color fidelity, above the 80 industry baseline [IES, 2020].

What happens if the flash process fails?

If power drops mid-flash, the BK7231N can enter boot-loop. You can recover over 3.3 V UART by re-uploading firmware—a 15-minute fix [CloudCutter Wiki, 2023].

Can I revert to the stock Tuya firmware?

Only if you made a backup with CloudCutter beforehand; without it, the OEM image is unavailable publicly [CloudCutter Wiki, 2023].

How much heat does the bulb emit?

Thermal tests show a 54 °C heatsink surface after 30 min at full white; within LED spec yet hot to touch [LEDs Magazine, 2022].

Is this bulb safe on 220 V grids?

No. The OM100/RGBW model is rated 120 V AC; using 220–240 V will fry the driver instantly [Feit Datasheet, 2023].