I have just recently completed a replacement of nearly all of my internal 1156 internal bulbs with these:
1156 led 102 | eBay
These are fairly inexpensive bulbs depending on what vendor you select. Not high quality, but for the price, you can clearly get 3x the bulbs for the prices some vendors want for one 1156 LED multi LED bulb.
I will tell you these have couple hundred lumens, but it's a cold light, meaning it's a very white light, but the power consumption is very low as with most LEDs.
In these lights:
Amazon.com: 12 volt Warm White LED Reading Light- Brushed Nickel Finish: Home Improvement
I have found that the warmer light is a lot more pleasing to the eye, but there are not many bulbs, any config that are as good as the linked cool white lights (at this price point) for the 1156 size bulbs.
To that end, I compromised since I boondock. Not unsatified, particularly at the price point and battery life has improved (unless I run the stereo).