LED candles

I bought a load of these remote control battery-powered LED candles: https://www.amazon.co.uk/dp/B07KJGZ3FN

They are activated via an infrared remote control, and I captured the following control codes using the Arduino-IRremote library. It uses the RC5 protocol, which inverts a toggle bit each time a new key is pressed (to distinguish between a long held key press and a double key press). The "command" itself is just the second byte:

Key	Code	Function	Example Send Code
ON1	0x1009/0x1809	Turn on, flickering	IrSender.sendRC5(0x0, 0x9, <numberOfRepeats>);
ON2	0x1001/0x1801	Turn on, solid	IrSender.sendRC5(0x0, 0x1, <numberOfRepeats>);
-	0x100A/0x180A	Dim brightness	IrSender.sendRC5(0x0, 0xA, <numberOfRepeats>);
+	0x100B/0x180B	Increase brightness	IrSender.sendRC5(0x0, 0xB, <numberOfRepeats>);
SL	0x100C/0x180C	Slow flicker speed	IrSender.sendRC5(0x0, 0xC, <numberOfRepeats>);
FL	0x1002/0x1802	Fast flicker speed	IrSender.sendRC5(0x0, 0x2, <numberOfRepeats>);
OFF	0x1008/0x1808	Turn off	IrSender.sendRC5(0x0, 0x8, <numberOfRepeats>);

Another batch I bought were a different style and use the NEC code (32bits, LSB first), as follows:

Key	Code	Function	Example Send Code
ON	0x00	Turn on	IrSender.sendNEC(0x0, 0x0, <numberOfRepeats>);
OFF	0x2	Turn off	IrSender.sendNEC(0x0, 0x2, <numberOfRepeats>);
4H	0x4	4h Timer	IrSender.sendNEC(0x0, 0x4, <numberOfRepeats>);
6H	0x6	6h Timer	IrSender.sendNEC(0x0, 0x6, <numberOfRepeats>);
FLF	0x8	Flicker Fast	IrSender.sendNEC(0x0, 0x8, <numberOfRepeats>);
Light	0xA	Solid Light	IrSender.sendNEC(0x0, 0xA, <numberOfRepeats>);
SL	0xC	Slow Flicker	IrSender.sendNEC(0x0, 0xC, <numberOfRepeats>);
FL	0xE	Fast Flicker	IrSender.sendNEC(0x0, 0xE, <numberOfRepeats>);
-	0x10	Dim	IrSender.sendNEC(0x0, 0x10, <numberOfRepeats>);
+	0x12	Brighten	IrSender.sendNEC(0x0, 0x12, <numberOfRepeats>);