Hello.
You don't need full wave rectifiers just for turning leds on. A half wave will do the job, fine.
20VA is too low, you gonna have only 13W at a power factor of 0.65. 13W means about 0.65A at 20V.
If you want 20V at 2.5A, you'll need, at least, 77VA (as Stevez said).
If you want 20V at 4A (2.5 + 1.5), you'll need, at least, 123VA.
You can substitute the 2 1000uF caps for a 2200uF only. And the 4 2200 ohms resistors for a 560 ohms only.
Tell me something, why do you need to turn so many leds on?
You don't need full wave rectifiers just for turning leds on. A half wave will do the job, fine.
20VA is too low, you gonna have only 13W at a power factor of 0.65. 13W means about 0.65A at 20V.
If you want 20V at 2.5A, you'll need, at least, 77VA (as Stevez said).
If you want 20V at 4A (2.5 + 1.5), you'll need, at least, 123VA.
You can substitute the 2 1000uF caps for a 2200uF only. And the 4 2200 ohms resistors for a 560 ohms only.
Tell me something, why do you need to turn so many leds on?