I use these bulbs in a halogen-cable system, which was previously equipped with 20W halogen bulbs. The bulbs have a pleasant color and are as promised significantly brighter than 20W halogen (whether they are comparable with 35W halogen I could not test). But a couple of points there are to be noted as partly criticized even by other reviewers: - The effective diameter is a bit larger than that of a halogen reflector lamp, there are some types of lamps, in which this bulb does not fit. - The light output forward I find less pleasant compared to brands halogen lamps, the light beam is focused mainly on the middle and on the edge shows an unsightly yellowish tint. - Halogen reflector lamps emit backward from a "halo", when the lamp construction permits. This is missing here completely, since this type LED bulbs do not emit backwards. This results in possibly an unusual illumination.
Nevertheless, I am all in all very pleased with these lamps - but because of the somewhat unsightly discoloration at the edge of the light cone I forgive only 4 points.
