Can the light be easily programmed to different flashing patterns, and what types of customization options would be most useful for commuting cyclists in low-light conditions, taking into consideration urban environments and the need for added safety features that could effectively alert or communicate with other road users, such as a sequence of flashes to signal lane changes or a distinct pattern to indicate the approach of a junction? Are there any existing cycling lights that offer such programmable features, or is this something that manufacturers should consider integrating into their products? If so, what kind of user interface would be most practical for cyclists to easily adjust and customize their light settings on the fly without compromising safety or requiring a steep learning curve?