I wish to do visible light experiments in the lab. Please suggest what type of setup (bulbs/lamps) I need to purchase? Please suggest to me, the make and the supplier of these items.
You need to have a constant temperature first (avoiding thermal effect) you need to know if Infrared are an interference or not. For solar irradiation simulation you can use Na lamp, with around 500 and 700 nm, in this condition you can have like solar simulation (chlorophylle Band). Very cheap lamp that you can find everywhere. If you need an IR filter just use a double beaker layer with water
I have successfully run photo-initiated radical brominations using a 200-300W halogen lamp (designed for DIY worksite illumination and available from any hardware store), placed about 20cm from the reaction vessel, and a water bath to filter some of the non-visible light and keep the reaction cool.
As Lounes says, you need to avoid any thermal effects. As well as concern for the photochemistry, a few hundred Watt lamp set close to your reaction will also damage plastic tubes and clips. So, I would also loosely wrap in aluminium foil anything that could melt/oxidise, taking care not to limit light getting into your reaction or the flow of air around the lamp and reaction vessel.
You can think of mercury vapour lamp for a uv-visible source.
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