<p><i>Phalaenopsis</i> orchids exhibit remarkable photosynthetic plasticity, enabling them to effectively acclimate crassulacean acid metabolism (CAM) to a wide range of light levels. Herein, the photosynthetic acclimation of <i>Phalaenopsis</i> Queen Beer ‘Mantefon’ was examined under different light intensities. <i>Phalaenopsis</i> clones grown under a photosynthetic photon flux density (PPFD) of 100&#xa0;µmol m⁻²&#xa0;s⁻¹ were subjected to different light intensities of 10, 50, 100, and 200&#xa0;µmol m⁻²&#xa0;s⁻¹ for either one day or two months of modified light levels, and their chlorophyll fluorescence response and CO₂ exchange rate were observed. The electron transport rate (ETR) varied rapidly to changing light levels, showing a significant positive correlation with light intensity after just one day of treatment. Only plants exposed to an elevated light intensity of 200&#xa0;µmol m⁻²&#xa0;s⁻¹ for 1&#xa0;day showed a decrease in ETR after midday. Moreover, after 2&#xa0;months, the ETR decreased more slowly under 200&#xa0;µmol m⁻²&#xa0;s⁻¹. Long-term exposure to varying light conditions for two months led to increased CO₂ uptake, even at reduced light intensities. The plants also exhibited an enhanced malic acid recovery rate under both low- and high-light conditions. Citric acid levels also varied with light intensity. High-light conditions led to a significant increase in plant growth, characterized by greater biomass and a higher number of leaves. Furthermore, stable carbon isotope analysis revealed differences in the daytime CO₂ uptake rate of <i>Phalaenopsis</i> plants grown under different light intensities for two months. In this manner, <i>Phalaenopsis</i> orchids exhibit remarkable plasticity in their photosynthetic pathways, allowing them to acclimate effectively to different light environments. Investigating <i>Phalaenopsis</i> light acclimation is crucial for understanding the mechanisms underlying photosynthetic optimization and growth in diverse light environments in CAM plants.</p>