This bike light comes with a head mount, it is absurdly bright for the price on a par with a car headlight. Wasafire Bike Light Super Bright Bicycle Front Light, USB Rechargeable LED Cycling Light(12800mAh Battery), Waterproof Mountain Road Cycle Flashlight with 3 Light Mode Option https://www.amazon.co.uk/dp/B07HBWRMT1/ref=cm_sw_r_cp_api_i_FIlbCb7KXAXAC
ordered perfect thanks
That's how most power tools are sold. You buy a starter pack with your first tools that includes batteries and a charger, and then you just buy the tool bodies to increase your set.
Anyone while the Ryobi one system will appreciate this as a good buy. I have the old version myself but it helped me fit spot lights in my kitchen tonight, when I decided it was a good idea to start doing them at 3:30 🙈
Just do google search for 18v led bulb. Plenty to choose from