As per my post from yesterday that I have found an excellent LED dimmer. Classic Instruments has one, check it out at classicinstruments.com and the sku #LEDDIM. It's $78.00 but looks very good.
Also,
@custodian, if you have a real good hardware store in your town, not Lowe's but a good old type hardware store look for a higher wattage bulb. You'd be surprised in the difference between a 1.34 watt bulb and a 3 watt bulb. Some that you get from Walmart, if they still carry them will say 3 watts, but at 14 volts. Well, your battery is only 12 volts which means that the 3 watt bulb is going to put out a bit more than half the wattage, or brightness at 12 volts. Somebody who knows the math can figure it out better than me, like what is the difference of a 14 volt bulb burning at 3 watts but at 12 volts? I've replaced most all of my bulbs in my gauges with higher wattage bulbs for 12 volts and the light was twice as bright.