Light session which were less light than expected

Tuesday I did:

Squats 3×3 120kg
Deadlift 3×3 140kg
Bench press 3×3 80kg

Today I did the same, only in 45 minutes and it felt ‘much heavier’.
Nevertheless it felt good and this is the step for my next semi heavy light training session tomorrow or Sunday. Depending of my energy level and/or will to push myself to my next level……