... : manually , half, Full, total threen stepsUsing methods∴ Fixing the Fluorescent light box the light stand or Ceiling track, loosen.∴ The screws by the ... sides of U shape stand. The angel of Fluorescent light can be adjusted.∴ Turn on the main power, and related ... .More informaion, pls visit www.retemac.com.cn Video / Studio Fluorescent light with Osram bulbs - TF552