Clones need far less light than mature plants. Too much light stresses them and delays rooting. Until roots form, the cutting can't pull enough water to support full-intensity photosynthesis, so high light just means more evaporation and more wilt.
Run an 18 on, 6 off schedule. Use low intensity fluorescent tubes, T5s, or a dimmed LED. Keep the fixture 18 to 24 inches above the dome. PPFD at the canopy should be around 100 to 200 micromoles. Pair this with proper humidity and temperature and your cuttings will have everything they need.
The giveaway that your light is too strong is curling, bleached, or yellowing leaves on cuttings that should be green. Back off distance or intensity immediately if you see this. Most modern LEDs have a dimmer — use it. Clones at 50 percent output on a full board is plenty for the first 10 days.
Once the clone has visible roots and new growth, slowly raise the intensity over a few days to prepare it for veg conditions. Don't move a freshly rooted clone straight under a full veg light the day you transplant. Ramp up over three to five days so the plant can build the wax layer and leaf structure it needs to handle real photon density.