The Brite Box for Toyota Tundra is a device that mounts securely in the engine bay and greatly contributes to driving safety on dark roads by improving both the output and coverage of high beam mode. The Brite Box will automatically keep low beams on with high beams with no additional switches required. The Brite Box with Fog Light Control will keep low beams and fog lights on with high beams with no additional switches required. The Brite Box Fogster will automatically keep the fog lights on with high beams with no additional switches required. With The Brite Box Anytime, you'll gain full control of your fog lights and be able to operate them on any light setting such as no headlights, with daytime running lights and with high beams. The Brite Box Anytime requires an additional switch and includes a stylish universal switch that can be mounted anywhere with 3M double sided tape. Upgrade to an OEM style push switch for a factory look. With Brite Box, you can enjoy the benefits of these improved beam patterns, without placing any additional loads on the vehicle's stock headlight switches or wiring. Made in the USA! Please Read: If your Tundra came with LED headlights from the factory then the only options are The Brite Box Fogster and The Brite Box Anytime because the low beams already stay on with high beams. With halogen headlights from the factory the low beams and fog lights shut off with high beams so you have all 4 options available to you. 2018-2021 Toyota Tundra On the 2018-2021 choose from 4 different options to control your lights the way you want. See options below.   Option 1: The Brite Box - will automatically turn low beams on when the high beams are activated  Option 2: The Brite Box Fogster - will automatically turn fog lights on when the high beams are activated  Option 3: The Brite Box with Fog Light Control - will automatically turn low beams and fog lights on when the high beams are activated The Brite Box, The Brite Box Fogster, and The Brite Box with Fog Light Control models are FULLY AUTOMATIC with no additional switches or controls to operate, but by using your existing factory high beam switch to activate the effect. Option 4: The Brite Box Anytime - gives you full control of your fog lights. This kit will allow you to turn your fog lights on in any light setting such as no headlights, with daytime running lights, and with high beams.   The Brite Box Anytime REQUIRES A SWITCH to turn your fog lights on at any time. When purchasing The Brite Box Anytime, it will include a Universal Switch (with a Blue LED). Upgrade to an OEM Style Push Switch here. For general product questions please contact the manufacturer (Aspire Auto Accessories). *The user/installer assumes all liability in using the product.