Spectral Insert for Small Horizontal Reflector. Spectral Insert for Small Horizontal Reflector. Pebbletone insert increases light intensity.This reflective insert has been machined to match the 12 bends in the small horizontal hood. Its pebbletone finish along with its bends blend the light evenly accross the the plants without hot spots!... Note: Ballasts, Lamps / Tubes are available separately. — Ships from Portland, Oregon USA....more info.