Check three places twice a day, in the morning after the lights have warmed the enclosure and again in the afternoon: the basking perch, the mid-enclosure branches and the cool lower retreat. Use a digital probe at perch height in each place, record the room temperature beside the enclosure readings, and add an extra check on any day when the room warms, cools or is heated differently. Adjust the lamp in small steps, then re-check that same place later the same day.
Placing the Probes Where the Chameleon Actually Sits
A dial fixed to the outside wall tells you the temperature of the glass or mesh, not the temperature of the animal. Fix one probe at the basking perch, level with the place where the chameleon's back sits under the lamp. Fix a second probe among the mid-enclosure branches where the animal rests between basking and drinking. Fix a third probe low in the foliage, in the coolest retreat the animal can choose. Keep each probe in the same place every day, out of the direct misting stream, because a probe that moves gives you movement in the figures rather than movement in the enclosure.
A hand-held infrared thermometer can spot-check a leaf surface or a perch as a backup, but it reads a surface rather than the air around the animal, so it supports the probe readings rather than replacing them. If the two methods disagree on the same perch, trust the probe left in place long enough to settle, and check whether the lamp, a window or a heating vent has changed since the morning reading.
Reading a Changeable Room Honestly
A screen enclosure follows the room faster than a solid-sided one, so the room itself is part of the record. Write down the room temperature at the same two check times, and note open windows, household heating switching on, or strong sun through a nearby window. On a day when the room swings, the afternoon enclosure reading matters more than the morning one, because the basking perch can climb while the cool retreat stays safe, or the whole enclosure can cool when the heating goes off early.
Watch the chameleon alongside the figures. A chameleon that stays at the cool bottom, gapes at the basking perch or stops travelling to drink is giving you information that belongs beside that day's readings. Equally, a normal spread of behaviour, with basking, moving through the middle branches and retreating to the lower foliage, supports the figures you recorded. Colour and appetite changes over several days belong in the same log, because they often follow a temperature drift rather than announcing a separate problem on the first day.
Adjusting Without Chasing the Numbers
Change one thing at a time and change it by a small amount. Raise or lower the basking lamp a little, fit a lower-output bulb, or adjust the thermostat setting, then re-check the basking perch and the mid-enclosure branches later the same day and again at the usual time the next morning. Never remove the cool retreat to force basking, never move the perch closer to the lamp as a quick fix, and never judge a change from a single reading taken minutes after the lamp moved.
If every reading falls on a cold day, check the bulb, the fitting and the thermostat before you change the layout, and keep the animal's water and misting routine unchanged while you work. If the basking perch alone runs high on a sunny afternoon, shade the affected side of the enclosure or reduce the lamp output rather than cooling the whole room for one perch. Record each adjustment with its date, so the next person does not reverse a change without knowing it was made. KinsLe's Care Teams keeps those twice-daily readings and lamp adjustments in one shared sequence, because you can assign each check to a named helper and see its timestamp beside the recorded figures.