The LED indicator bulbs arrived today and, TBH, they're sh!te

First of all, they only start flashing after about 10 seconds, until then they're just on all the time. This may be because I didn't install any kind of load resistor, though... Perhaps worse, though, is the fact that they're way too dim compared to the standard lights and, IMO, probably illegal. I removed the one I tried immediately and put the stock bulb back.
If anyone has any suggestions and/or remmedies, then I'm all ears.