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We present the first results of eight Globular Clusters (GCs) from theAstroSat/UVIT Legacy Survey program GlobULeS based on the observations carriedout in two FUV filters (F148W and F169M). The FUV-optical and FUV-FUVcolor-magnitude diagrams (CMDs) of GCs with the proper motion membership wereconstructed by combining the UVIT data with HST UV Globular Cluster Survey(HUGS) data for inner regions and Gaia Early Data Release (EDR3) for regionsoutside the HST's field. We detect sources as faint as F148W $\sim$ 23.5~magwhich are classified based on their locations in CMDs by overlaying stellarevolutionary models. The CMDs of 8 GCs are combined with the previous UVITstudies of 3 GCs to create stacked FUV-optical CMDs to highlight thefeatures/peculiarities found in the different evolutionary sequences. The FUV(F148W) detected stellar populations of 11 GCs comprises 2,816 HorizontalBranch (HB) stars (190 Extreme HB candidates), 46 post-HB (pHB), 221 BlueStraggler Stars (BSS), and 107 White Dwarf (WD) candidates. We note that theblue HB color extension obtained from F148W$-$G color and the number of FUVdetected EHB candidates are strongly correlated with the maximum internalHelium (He) variation within each GC, suggesting that the FUV-optical plane isthe most sensitive to He abundance variations in the HB. We discuss thepotential science cases that will be addressed using these catalogues includingHB morphologies, BSSs, pHB, and, WD stars.

Globular Clusters UVIT Legacy Survey (GlobULeS) I. FUV-optical Color-Magnitude Diagrams for Eight Globular Clusters