We first built these with 4300K and, although brighter, they looked just as bad as the original bulbs. Regarding D.O.T. approval, I like what Snyder's says on their website:
Quote:
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When your Model T or Model A was delivered the headlight bulbs were 21-21 cp. If you wanted a brighter light you used the 21-32 but kept a lookout for the cops because those bright bulbs were illegal. Now we want as bright a light as we can get and use the 32-32 or 32-50.
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Nobody seems to sell the D.O.T. approved, factory specified 21-21 bulbs anymore, and I for one, would not want them.