25 Buttons/Icons designs for Green iPhone App (Phase 1 of 3)

JouleBug is an iPhone app that makes energy conservation/efficiency a casual social game

We’re currently bootstrapping our small company after having successfully sold technology to a leading software company. Utilizing automation, knowledge and social interaction we plan to get a measurably increased portion of the population to understand, discuss, and compete on how much energy they use and how they can use less on a day to day basis by making smarter consumption decisions. The opportunity for changing the personal energy consumption game is huge and we want to make a difference!

At a very high level, players will earn Achievements that relate to energy saving activities (e.g. Lower Thermostat, Insulate Attic, Replace incandescent bulbs with CFLS, etc.) and for recruiting other players. We are looking for the icon design of these Achievements.
While we believe that our potential target is everyone who uses energy, we recognize that we’re initially aiming at iPhone users that like to play/compete in a social environment and are open to the idea of energy conservation. JouleBugs care about the planet enough to make some changes in their own energy behavior choices and also encourage/pressure their peers to do the same.

We require 25 icon designs that JouleBugs can earn. Each represents an energy saving behavior/activity or recruiting. Some possible suggested appearances are buttons, badges (round/square), or pins. Designs must be adaptable for the following contexts: Facebook and iPhone app screen. (see attachment for examples)

Icons are to be coveted. Design should be original, colorful, evoke curiosity and a "Tell me more" feeling. We consider the Icon designs to be different from the JouleBug and so the JouleBug should not be mixed into the icon design. We are not looking for icons that could be confused with something from Badgeville or foursquare. There are eight Achievement categories: Social, Home, Green Energy, Lawn & Garden, Food & Healthy Living, Transportation, Solid Waste, and Community. Visual clues of categories in consistent design should be included. Refer to Handbook1_pdf for background for each icon.

COMPETING DESIGNERS ONLY NEED TO CREATE THE FIRST 5 ICONS. AFTER A WINNER IS SELECTED, THEY CAN CREATE THE REMAINING 20 ICONS IN THE SAME STYLE. (See attachment for full list.)
Icons for competition (96 x 96) -PNG
1 Good Friend - for recruiting friends to join
2 Connector - for providing utility login credentials
3 Sleeping Beauty (Ch9 in Handbook)
4 Super Cycles (Ch10 in Handbook)
5 Light Saver (Ch11 in Handbook)
Bonus: iphone screen context