Bukkit

Version 0.1

Original test version.

Version 0.2

Lights are created wherever the player walks when the command is enabled.

Version 0.3

Lights are deleted behind the player.

Version 0.4

Significantly smoother lighting and no longer deletes rail, grass, flowers, etc.
Fixed mob models missing parts.

Version 0.5

Light blocks are left behind less frequently in exchange for slightly rougher lighting.
Fixed Login error.
Fixed server reload error.
Light is created at first use of the command rather than first movement after activation.
Light is removed after disable.
Cleaned Code
Beta Release.

Version 0.6

Save activation state upon log out and server restart or reload via configuration file.
Light no longer gets created in water. Helped fix bugs with water.
Start of editable configurations.
Light is no longer stuck on server reload.

Version 0.7

Allows for configurable held items to emit light.
Fixed calling /hl from the console causing an error.
Command to enable HeadLamp is now /hl enable and command to disable HeadLamp is now /hl disable.
Now with permissions.
    headlamp.*:
        description: Gives access to all HeadLamp Commands
        children:
            headlamp.enable true
            headlamp.disable true
    headlamp.enable
        description: Allows players to enable HeadLamp.
        default: op
    headlamp.disable
        description: Allows players to disable HeadLamp.
        default: true
Hopefully a little more efficient. (Well yes more efficient but hopefully noticeably.)

Occasionally block lighting doesn't update underground.