Arduino Circuit for High Power LED + Servos
You should use a constant current driver for the LED such as this

https://www.digikey.com/product-detail/en/infineon-technologies/BCR420UE6327HTSA1/BCR420UE6327HTSA1CT-ND/2270374

See page 23
https://www.infineon.com/dgdl/Infineon-BCR420U-BCR421U-DS-v02_01-EN.pdf?fileId=5546d4626102d35a01617524f09e061d

The driver prevents the current from increasing as the LED heats up and tries to allow even more current to flow, leading to an overheating/burnout condition.