hand holds slight bulb with leafs,one line art,hand drawn continuous contour.green energy idea concept.sign of environmental

hand lightbulb ecology green energy environmental friendliness art artwork brainstorm bulb communication concept continuous contour decorative design drawing eco economic editable electronic electronics fingers gesture gestures gesturing graphic grow drawn handbreadth invention irradiation isolated lamp light line one outline palm plant power sign single sustainability symbol technology thumb vector holds slight leafs contour green idea concept sign friendliness decoration banners posters editable stroke