eBay
4Pcs Plastic Helmet Clips Headlamp Hard Hat Safety Cap Hook Attachment Head Light Clamps Black Set Outdoor Tools Head Flashlight
Aliexpress UK
Helmet light comes with rail mount, molle attachment to have it chest mounted and a helmet mount for non rail helmets
eBay
FMA Helmet Safety Flashing Light IR Strobe Waterproof Outdoor Equipment Survival Signal Light Hiking Cycling Lamp
Aliexpress UK
SF SAS Surefire helmet light HL1-A-TN New Please inspect all images and make sure you are happy with your purchase as we do not accept returns Will be dispatched royal mail tracked 24
eBay
4pcs Plastic Helmet Clips Easy Mount Hard Hat Light Clips Torch Headlamp Clamp Holder Led Flashlight Parts Accessories
Aliexpress UK
British UKSF PARA RANGER SAS SBS Surefire HL1-B-TN Helmet torch Light , blue and IR. No Helmet clip but supplied with the more useful molle adapter. Looks to be almost brand new . All surefire branded not some cheap knock off .Complete with box and user manual. Please study the pictures carefully they form part of my description and any questions please ask. Check out my other listing's for more kit.
eBay
Mini 3LED Headlight Outdoor Hat Clip Headlight Helmet Light Camping Head Flashlight Forehead Front Hunting Baseball Cap Lamp
Aliexpress UK
New Boxed Surefire HL1-B-TN Helmet Light White IR LED. Condition is New. Dispatched with Royal Mail Tracked 24.
eBay
70X90MM Flexible Bendable Led Light Eyes Kits for Helmet Masks Eye Lights Cosplay Modified DIY Accessories Props Can Cropped
Aliexpress UK
Brand new ACH helmet light made by surefire Includes infrared I FF Beacon Waterproof up to 1 m meter Multiple settings 48 hour battery life for white light 96 hours battery life for blue light 120 hours battery life for infrared Made for ACH, LWH, MICH, PASGT 
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LED Headlamp Rechargeable COB Super Bright Head Lights 5 Modes Helmet Lights Motion Sensor For Outdoor Camping Sports Fishing
Aliexpress UK
Capability: Carrying Battery Specifications CR123.
eBay
USB Charging Outdoor Tactical Helmet Safety Flashing Light Survival Signal Light Waterproof Lamp For Hunting Hiking Cycling
Aliexpress UK
Once attached, the flashlight can be easily slid onto the mount, where locks into place; depressing a small lever slides the Surefire headlamp right off. Available in tan or blakc models. Type : Head Lamp.
eBay
10pcs/set Hard Hat Light Clips Helmet Clips Attachment Head Light Clamps Headlamp Hat Non-Slip Safety Caps Hook Outdoor Tools
Aliexpress UK