Until about a year ago, HID was about the only product for a light upgrade brighter than stock and a light upgrade that had color options. However, being stuck with a single color, the high cost, and the heat sometimes outweighs the brightness value of HID.
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In the 2015 Tundra fog light application we would actually recommend LED fog lights versus the HID. Using LED bulbs in fog lights will also match the color of HID headlights at a lower cost. The tabs of the HID bulbs are large in comparison to the Tundra H16 halogen fog light bulb. It is possible to fit an HID bulb into the new Tundra fog light housings, but it takes a lot of work and you will most likely damage or destroy the H11 HID bulb in the process. You can do it, but as we found out during testing, it is not the best option.
Here you can see a couple different options for LED bulb upgrades that are plug and play, super easy to install and very very bright!
The Level 1 LED fog light bulbs from Headlight Revolution are the same size as the OEM bulbs, but use LED chips to create the light source. These are not quite as bright as the original bulbs but they look amazing, and look like high power HID bulbs at a fraction of the cost of a high quality HID kit.
The Level 2 LED fog light bulbs from Headlight Revolution fit the same as the OEM bulbs, but are a little larger. They use a fan and large heat sink to keep the bulb cool and bright and use LED chips to create the light source. These are easily TWICE AS BRIGHT as the original bulbs and they look amazing. Also you can use optional color shields to customize the look of the bulbs to be whatever color you want!
For more info on different LED fog light bulb upgrades for your 2014-2016 Toyota Tundra just watch this video!