A lamp holder of an LED projection lamp includes a heat dissipation pipe, a heat dissipation fin unit, a heat dissipation tray, and a lampshade. Various field boundary indicators can be removably attached to the marker stake. The linking moiety is electrostatically bound to the lipid bilayer, and the targeting moiety is covalently bound to the linking moiety. The first controlled device receives user input, assigning the command to a selected button of a second remote control. In this manner, the purchaser of the aeration service can avoid relatively high fixed costs that can be associated with various aeration hardware.