I bought them off ebay a few years back now. The guy said they were road legal, but personally I'd have started with clear SP lights then sprayed them with lacquer tinged with Black paint so they were more heavy smoke than Black. They are OK at night, many a cop car following me heading for their HQ which was just along the road from Anna's Mum's house. Never got pulled.
In daylight though I'd say the lights were a bit dim, brake lights just brighter than side lights, but with the high level light it took your eye off it. At night the tail lights were obviously duller compared to not being tinted, but still see the car well down the road. I always knew which car was mine in the road when playing catch up with the GF.

The indicators in daylight too were visible but not as they should in my opinion.
Someone on here a while back said for an MOT, if the guy could see the lights they were fine. Don't know if that's true, by the time it went for an MOT it was fitted with SP sport lights. Although Anna liked to swap them around every other month for a change.