Review on Topnisus [Pack of 10] Clip-on Ferrite Core Ring Bead Cable Clip - Anti-Interference Filter for RFI EMI Noise Suppression, High-Frequency Optimization (5mm Inner Diameter) by Phil Kuebler

My LED landscape lights are interfering with VHF TV reception - the lights completely block channel 11 reception when on. I tested it on a lamp next to the antenna and the effect was immeasurable, so this doesn't solve my problem. It would be useful to know the type of ferrite so one can examine and determine if that type would be effective at the spurious frequency. I tried several rings in different places between the lamp and the power supply (also tried different power supplies). They were ineffective. I gave it 3 stars not because it didn't solve my problem, but because 1) the parts don't include the ferrite type, 2) I got the wrong size ring so I only have 9 that are used as intended be able. and 3) claims to help solve problems with television reception, but does not specify which bands are most effective; VHF and UHF are completely different frequency bands.