I have been a user of performance lights for a number of years. I have been happy with the lights. I replaced the 20w light bulb with another 10w light bulb. 2 10w light bulbs have plenty of light for me.

I hate the batteries that came with the performance lights. When the battery would no longer hold a decent charge, I replaced the battery with a 6V 8,000 ma pack from Batteries Plus. This allows me to do my roundtrip commute on one charge.