Irradiate at ≈ 405 nm.

For details follow the link:

Photolysis of Hydrogen Peroxide, an Effective Disinfection System via Hydroxyl Radical Formation.

Hiroyo Ikai, Keisuke Nakamura, [...], and Masahiro Kohno.

Anticrob Agents Chemither, 54 [12] (2010)5086-5091.

[See Under Materials and Method]

5, 5′-dimethyl-1-pyrroline-N-oxide (DMPO).

Full name: 3,4-dihydro-2,3-dimethyl-2H-pyrrole 1-oxide.