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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@allObjects
...that's a bit meagre... each LED - red OR green OR blue - consumes about 20 mA when running on 255 (with intensity 255). So when all shining white with 255 255 255 (with intensity 255), that's all colors - red AND green AND blue - on, a single 'bulb' consumes 60 mA. With 500 mA you can ran about 8..9 'bulbs' at one time and then the power supply tanks. There are USB power supplies out there that can deliver more than just 500 mA. Furthermore, I do not know what exact kind of LEDs you are using and also what the software is looking like, in other words how you drive the LEDs: continuously or with pulses. For the naked eye fast pulsed LEDs look like continuously on, and this way you can seemingly have more than above number of LEDs shining white, but with an overall less brightness delivered. To be of better help, you have to provide a bit more technical details, most importantly what LEDs are used and how they are powered physically and over time.