This compact HMI Complete with lamphead,4-leaf barndoor, electronic ballast/conventional ballast, and head to ballast cable. HMI 4000W Compact Complete with lamphead,4 ... -leaf barndoor, electronic ballast/conventional ballast, and 7m/15m head to ballast cable. Lamphead with 4-leaf Barndoor Universal Electronic ballast 2500/4000W Conventional Ballast :4000W 7m ...