This listing is for 2 ILFORD Multigrade 500H Dichro Nano coated colored Filters 1 Blue & 1 Green Filter replacements for the ILFORD 500H that uses either ELH 300 Watt lamps or the Smaller Ilford 500 head with 150 Watt lower powered lamps. 

These filters create their spectrum with perfect INDIGO BLUE( High Contrast Blue filter with a touch of Magenta.   & Primary Green, for the  (Lowered contrast values, activated dichroic filter) 

Cheap dichroic filters are not accurately calibrated to the Ilford IMG 500 H or the 500 C, head or light source.

PLease look at my ILFORD 500 Hot mirrors which double the light output of any modern 500 H light source or head. 

Thanks for all of your support over the yers ebay in bringing refurbished Ilford Light source.